Preheat oven to 425°F. Grease a muffin pan or spray with cooking spray and set aside.
To make the glaze, in a medium bowl, combine ketchup, chili sauce, and brown sugar, and set aside.
In a small skillet, heat 1 tablespoon olive oil over medium heat. Add the onion and cook until tender, about 3 to 4 minutes. Cool completely.
In a large bowl, combine beef, cooled onion, bell pepper, bread crumbs, Worcestershire sauce, egg, parsley, salt, and pepper. Add ¼ cup of the glaze mixture. Mix just until combined.
Divide the meat mixture over 10 muffin wells. Divide the glaze over the tops of the meatloaves.
Bake uncovered for 22-26 minutes or until cooked through, and the loaves reach an internal temperature of 160°F. Rest for 5 minutes.
