Cheesy Shell Lasagna - cooking recipe

Ingredients

1 1/2 lb. lean ground beef
2 medium onions, chopped
1 garlic clove, minced
1 (14 1/2 oz.) can stewed tomatoes, cut up
1 (14 oz.) jar meatless spaghetti sauce
1 (4 oz.) can mushroom stems and pieces (undrained)
8 oz. uncooked small shell pasta
2 c. (16 oz.) reduced-fat sour cream
11 slices (8 oz.) reduced-fat Provolone cheese
1 c. (4 oz.) shredded part-skim Mozzarella cheese

Preparation

In a nonstick skillet, cook the beef, onions and garlic over medium heat until meat is no longer pink; drain. Stir in tomatoes, spaghetti sauce and mushrooms. Bring to a boil. Reduce heat; simmer, uncovered, for 20 minutes.