Preheat oven

Heat the olive oil in a large nonstick skillet over medium-high heat.

Add chopped onion, chopped carrot, dried oregano, and minced garlic; saute 2 minutes. Cool.

Combine onion mixture, 1/2 cup ketchup, and the remaining ingredients except cooking spray in a large bowl.

Spoon the meat mixture into 12 muffin cups coated with cooking spray.

Top each with 2 teaspoons ketchup. Bake.

Let stand for 5 minutes.