Pesto is the ingredient that makes just about anything taste better. After a few weeks in Italy and tasting Genovese basil, it’s going to be our summer obsession, turning something as simple as a grilled chicken sandwich into a lunch (or dinner) that makes us actually excited for ‘chicken‘. We’re piling on perfectly marinated chicken, smoked mozzarella, sun-dried tomatoes, and greens as a simple celebration of fresh, seasonal, and serious flavor.
For a perfect juicy chicken breast and melty cheese, we use two methods. Grill first for the char and the crust, then broil with the cheese on top so you get a pull of melted mozzarella in every bite instead of a cold slice sitting on hot meat. It took a few rounds to land on the ciabatta over any other bun because the structure holds up to the pesto and the tomatoes without going soggy and falling apart on us.
🔪 Ingredients for Grilled Chicken Pesto Sandwich
- Chicken breasts: Large, boneless, skinless – sliced lengthwise into thin fillets so they cook fast and evenly on the grill without drying out. Two breasts make four fillets, one per sandwich.
- Lemon zest and juice
- Olive oil
- Italian seasoning
- Garlic
- Mozzarella cheese: Sliced, not shredded. Smoked mozzarella adds a layer of flavor that plain fresh doesn’t. Ask for it at a deli counter if you can find it.
- Ciabatta rolls: Soft ciabatta holds up better with the pesto and toppings than a brioche bun.
- Pesto sauce: Your call on brand or homemade. The kale-cashew pesto from Trader Joe’s works well here – it’s less oily than some basil pestos and doesn’t overwhelm the chicken.
- Sun-dried tomatoes
- Microgreens or micro-arugula: Adds a peppery bite and some green freshness.
Equipment
- A grill or grill pan for the chicken
- A small baking sheet for the broiler finish
📝 How to Make Grilled Chicken Pesto Sandwich
- Slice each chicken breast lengthwise into two thin fillets and place in a medium bowl.
- Zest and juice the lemon directly over the chicken.
- Marinate the chicken: Add olive oil, lemon zest, lemon juice, kosher salt, black pepper, Italian seasoning, and minced garlic to the bowl. Toss to coat thoroughly. Marinate at least 20 minutes; the lemon acid needs time to work.
- Grill the chicken: Heat a grill or grill pan over medium-high heat. Grill the fillets about 3 minutes per side, until cooked through (165°F internal), with clear grill marks and a golden-brown crust. Pull from heat.
- Broil with cheese: Preheat your broiler and line a small baking sheet with foil. Place the grilled fillets on the sheet and cover each with 1 oz of mozzarella. Broil 3 to 5 minutes, until the cheese is fully melted and starting to bubble at the edges.
- Spread pesto generously on both cut sides of each ciabatta roll.
- Place a cheesy chicken fillet on the bottom half of each roll.
- Top with 1 tablespoon of julienned sun-dried tomatoes, a handful of microgreens, and the top half of the roll.
🔄 Substitutions
- Chicken breasts for chicken thighs: Boneless, skinless thighs work well and stay juicier on the grill – and we personally enjoy them better. Increase the cooking time by 1 to 2 minutes per side, then cook them to 175°F.
- Smoked mozzarella for fresh mozzarella: Fresh mozzarella melts beautifully but loses the smoky depth. The sandwich is milder and slightly creamier.
- Ciabatta for focaccia: Works fine if you can find a sturdy focaccia. Avoid anything too soft; it’ll collapse under the pesto and tomatoes within minutes of building.
- Pesto for sun-dried tomato pesto: If you want to lean into the tomato element, a sun-dried tomato spread in place of the green pesto is a richer, more savory result. Both halves of the flavor profile shift toward umami and away from herb-brightness.
- Microgreens for baby spinach: Neutral swap, just less peppery. Baby arugula keeps the bite; regular spinach softens things out considerably.
- Sun-dried tomatoes for roasted red peppers: Sweeter and less tangy. Good substitution but the sharpness that cuts through the pesto disappears.
💡 Meat Nerd Tips
- Don’t skip the 20-minute marinate. Less time and the lemon juice hasn’t had a chance to penetrate the meat – you get surface flavor only. After more than 2 hours, the acid starts breaking down the texture, and the chicken turns slightly mushy at the edges. Twenty to thirty minutes is the window.
- Dry the fillets before they hit the grill. Shake off excess marinade and pat lightly with paper towels. Otherwise, you’ll be dealing with some serious flare-ups.
- The broil is non-negotiable for the cheese. Melting mozzarella on the grill almost always results in the cheese running off the chicken before it’s fully melted. The foil-lined sheet under the broiler keeps it controlled and gets a slight golden color on top.
- Build it immediately and eat it immediately. This isn’t a make-ahead sandwich as the pesto soaks into the bread and makes it soggy.
🍽️ What to Serve with Grilled Chicken Pesto Sandwich
This sandwich runs rich with pesto and cheese, so something bright or crunchy on the side balances it out.
- A simple arugula salad with lemon vinaigrette cuts right through both.
- If you want something more substantial, this pairs naturally with the rest of your grilled chicken breast lineup – double a batch of the marinated fillets and you’ve got chicken for a salad the next day.
- If you’re building out a full summer chicken spread, the Grilled Chicken Caesar Sandwich and the Classic Grilled Chicken Sandwich round out a full sandwich rotation that proves chicken belongs in the center of the grill, not the side.
🧊 Leftovers and Storage
- Store the grilled, cheese-topped chicken fillets separately from the bread and toppings, in an airtight container in the fridge for up to 3 days.
- Do not store assembled sandwiches. The ciabatta goes soft within hours once pesto is applied.
- Reheat chicken in a 350°F oven for 8 to 10 minutes, or in a skillet over medium heat until warmed through. Microwave works but the crust softens.
- Pesto, sun-dried tomatoes, and microgreens store separately and are good for up to a week (pesto) and 5 days (tomatoes) in the fridge. Microgreens are best fresh.
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Grilled Chicken Pesto Sandwich
Lemon-marinated grilled chicken with broiled smoked mozzarella, sun-dried tomatoes, pesto, and microgreens on soft ciabatta. Build this one right before you eat it.
Recommended Equipment
- Grill or grill pan
- Small rimmed baking sheet (line with foil)
- Microplane or zester
- Mixing bowl (medium, for marinating)
Ingredients
For the Chicken Marinade:
- 2 chicken breasts boneless skinless breasts: sliced lengthwise into thin fillets about 1/4 to 1/2" thick. Use a meat mallet to evenout the thickness if needed.
- 1/2 teaspoon lemon zest
- 1 tablespoon lemon juice
- 2 tablespoons olive oil
- pinch kosher salt
- pinch black pepper
- 1 teaspoon Italian seasoning
- 2 cloves garlic: minced
For the Sandwiches:
- 4 ounces mozzarella cheese sliced,. smoked mozarella, if you can find it
- 4 ciabatta rolls or your favorite bread
- 8 oz pesto sauce your favorite brand or homemad
- 4 tablespoons sun-dried tomatoes julienned
- 1 cup microgreens or micro-arugula or arugula
Instructions
Prep the Chicken
- Slice each chicken breast lengthwise to make two thin fillets. Place in a medium bowl.
Marinate
- Zest and juice the lemon. Add olive oil, lemon zest, lemon juice, kosher salt, black pepper, Italian seasoning, and minced garlic to the bowl. Mix with the chicken fillets, coating thoroughly. Allow to marinate for at least 20 minutes.
Grill
- Place a grill pan over medium-high heat (or use an outdoor grill). Grill chicken fillets about 3 minutes per side, until cooked through (165°F internal) and golden brown. Remove from heat.
Broil with Cheese
- Preheat broiler and line a small baking sheet with foil. Place grilled chicken fillets on the baking sheet and cover each with 1 oz of mozzarella cheese. Place under broiler for 3 to 5 minutes, until cheese is completely melted.
Build the Sandwich
- Spread pesto sauce on the inside of each ciabatta roll, top and bottom. Place a cheesy grilled fillet onto the bottom slice of bread. Top with 1 tablespoon of julienned sun-dried tomatoes, a handful of microgreens, and the top of the roll.
Notes
- Store grilled chicken separately from bread and toppings. Keeps in the fridge up to 3 days.
- Do not assemble ahead — the ciabatta softens quickly once pesto is applied.
- Reheat chicken at 350°F for 8 to 10 minutes or in a skillet over medium heat.
- Smoked mozzarella from a deli counter is worth the upgrade if you can find it.
Charcoal Grill: Set up a two-zone fire with coals banked to one side. Grill fillets over direct heat for 3 minutes per side until you hit 165°F internal and the crust is golden and firm. Move to indirect if they’re coloring too fast before the center is done. Gas Grill: Preheat all burners to high for 10 minutes, then reduce to medium-high before adding the chicken. Clean, oiled grates are non-negotiable here – a cold grate tears the fillet instead of releasing it. Grill 3 minutes per side; the chicken releases cleanly when it’s ready to flip. Grill Pan (Stovetop): Cast iron over medium-high, preheated for at least 3 minutes before the chicken touches it. Pat fillets dry before they go in – a wet fillet steams instead of sears, and you lose the crust. Work in batches if needed; crowding drops the pan temp and kills the color.
Nutrition
Serving: 1g | Calories: 643kcal | Carbohydrates: 36g | Protein: 39g | Fat: 38g | Saturated Fat: 9g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 8g | Trans Fat: 0.01g | Cholesterol: 99mg | Sodium: 1120mg | Potassium: 634mg | Fiber: 3g | Sugar: 4g | Vitamin A: 1434IU | Vitamin C: 6mg | Calcium: 260mg | Iron: 2mg
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Quick Summary
A lemon-herb marinated chicken breast, grilled and finished under the broiler with melted smoked mozzarella, loaded onto ciabatta with pesto, sun-dried tomatoes, and microgreens. The double-cook is what makes it — grill for the char, broil for the cheese. Build it right before you eat it.
❓ FAQs
Can I make this without a grill?
Yes. A cast iron grill pan on the stovetop over medium-high heat works well — you get grill marks and a solid sear. The broiler finish stays exactly the same.
What’s the best pesto for this sandwich?
Any pesto that isn’t too oily. A thicker, nuttier pesto holds to the ciabatta better than a loose, oil-heavy one. Homemade, store-bought, basil or kale-based all work — just taste it before spreading and adjust the amount accordingly.
How do I know when the chicken is done?
165°F internal temperature is the target. Since these are thin fillets, 3 minutes per side on a hot grill is usually right, but use a thermometer to be sure. The crust should be golden brown and firm, not translucent or soft at the edges.
