Lasagna Casserole

1 lb ground beef , uncooked 1/4 cup onion , chopped 1/2 teaspoon salt 1/2 teaspoon pepper 1 (16 ounce) package pasta shells , cooked 6 cups mozzarella cheese[...]

1 (8 ounce) bag egg noodles (medium size noodles) 1 lb ground turkey or 1 lb ground beef , seasoned with salt, pepper, italian seasoning 1 (26 ounce) jar[...]

1 lb ground beef 1 large onion , chopped 2 garlic cloves , chopped 1 teaspoon oregano 1 teaspoon basil 1 (16 ounce) can plum tomatoes (drain tomatoes and[...]