Preheat oven to 350 degrees F. Heavily spray 12 muffin cups with non-fat cooking spray.
Heat olive oil in a large nonstick skillet over medium-high heat. Add onion, carrot, oregano, and garlic, and saute 2 minutes. Remove from heat and let onion mixture cool.
In a large bowl, combine onion mixture, ground beef, 1/2 cup ketchup, crushed crackers or bread crumbs, mustard, Worcestershire sauce, pepper, salt, and eggs. NOTE: I like to use my hands for mixing meatloaf.
Spoon meat mixture into prepared muffin cups. Top each with 2 teaspoons ketchup.
Yield: 6 servings (serving size = 2 muffins).
Diner Meat Loaf Muffins Recipe: https://whatscookingamerica.net/beef/meatloafmuffins.htm