1 pound lean (90% or leaner) ground beef
1/2 cup chopped onion
1/3 cup fine, dry, whole-wheat breadcrumbs
1 large egg
6 tablespoons ketchup, preferably no-salt-added
2 teaspoons chili powder
1 teaspoon ground cumin
1/4 teaspoon salt
1/4 teaspoon freshly ground pepper
1/2 cup shredded extra-sharp Cheddar cheese
1/8 teaspoon ground chipotle pepper
Preheat oven to 400°F. Coat four 8- to 12-ounce small baking dishes, such as mini loaf pans, with cooking spray and place on a rimmed baking sheet. (Alternatively, make freeform meatloaves and bake directly on the baking sheet.)
Combine beef, onion, breadcrumbs, egg, 2 tablespoons ketchup, chili powder, cumin, salt and pepper in a bowl; mix well. Divide the mixture into 4 even portions and place in the prepared baking dishes. Make a 1 1/2-inch-deep indentation with your finger down the length of each meatloaf. Stuff each with 2 tablespoons cheese and pinch the edges closed to seal.
Combine the remaining 4 tablespoons ketchup and chipotle in a bowl; spread over each loaf.
Transfer the baking sheet to the oven. Bake until an instant-read thermometer inserted in the center of a loaf registers 165°F, 20 to 30 minutes.
Per serving: 382 calories; 17 g fat ( 7 g sat , 6 g mono ); 148 mg cholesterol; 18 g carbohydrates; 4 g added sugars; 37 g protein; 2 g fiber; 378 mg sodium; 468 mg potassium