Black Bean Rice Burgers

1 (15 ounce) can black beans, rinsed and drained

1 cup cooked brown rice

1 small onion, finely chopped

1 egg, lightly beaten

1 cup bread crumbs

2 tablespoons salsa

¼ cup reduced-fat sour cream

¼ cup salsa

4 hamburger buns, split

4 lettuce leaves

4 slices reduced-fat Cheddar cheese

Mash beans with a fork in a large bowl. Stir in rice, onion, egg, bread crumbs, and 2 tablespoons salsa; mix well.

Heat a large nonstick skillet over medium heat; drop bean mixture by 1/2-cupfuls into skillet and flatten to 1/2-inch thickness. Cook until each side is firm and browned, 4 to 5 minutes per side.

Combine sour cream and 4 tablespoons salsa in a small bowl. Place a bean burger on bun with a lettuce leaf, 1 slice Cheddar cheese, and top with salsa mixture. Repeat with remaining ingredients.