Cheesy Shell Lasagna

Cheesy Shell Lasagna

1-1/2 pounds lean ground beef
2 medium onions, chopped
1 garlic clove, minced
1 can (14-1/2 ounces) diced tomatoes
1 jar (14 ounces) meatless spaghetti sauce
1 can (4 ounces) mushroom stems and pieces, undrained
8 ounces uncooked small shell pasta
2 cups (16 ounces) sour cream
11 slices (8 ounces) provolone cheese
1 cup (4 ounces) shredded mozzarella cheese

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

Meanwhile, cook pasta according to package directions; drain.Place half of the pasta in an ungreased 13-in. x 9-in. x 2-in. baking dish. Top with half of the meat sauce, sour cream and provolone cheese. Repeat layers. Sprinkle with mozzarella cheese.

Cover and bake at 350° for 35-40 minutes longer or until the cheese begins to brown. Let stand for 10 minutes before cutting. Makes 12 servings.