Baked Sloppy Joe Tacos

Ingredients –  olive oil divided – lean ground beef –  onion  – garlic cloves  – can whole peeled tomatoes –  bottle tomato-based chili sauce – Worcestershire sauce –  ancho chile powder or chili powder –  garlic powder –  onion powder – brown sugar –  ground cumin – Crisp taco shells warmed –Taco fixings: Sour cream