Prep your grill, clean and oil the grates.
In a bowl, toss the red pepper, feta and parsley together.
Whisk the hummus and yogurt together; set aside.
Grill the burgers to desired doneness. Toast the flat breads.
Arrange the lamb burgers over lettuce, cucumbers, and tomatos on the flat bread. Spoon hummus sauce over top and sprinkle a hefty portion of the red pepper feta mix on top.
Serve and enjoy.