1 (7-ounce) can chipotle chiles in adobo sauce
1 tablespoon butter
1/2 cup finely chopped onion
1/2 cup finely chopped green bell pepper
1 garlic clove, minced
2 tablespoons all-purpose flour
1 (14 1/2-ounce) can diced tomatoes and green chiles, undrained
4 cups hot cooked elbow macaroni (about 2 cups uncooked)
2 cups (8 ounces) shredded reduced-fat sharp cheddar cheese
1 cup 1% low-fat cottage cheese
1 cup 2% reduced-fat milk
1/4 cup (1 ounce) grated fresh Parmesan cheese
1 large egg, lightly beaten
Cooking spray
3 tablespoons dry breadcrumbs