Lasagna without biscuit greens

18 jumbo pasta shells 1 1/2 pounds ground beef 2 tablespoons chopped onion 1 (12 ounce) can tomato paste 1 (14 ounce) can tomato sauce 1/2 teaspoon salt 1/2[...]

1 (16 ounce) package lasagna noodles 2 tablespoons butter 2/3 cup chopped red bell pepper 2/3 cup chopped fresh mushrooms 1/2 cup chopped onion 2 cups small[...]

1 (16 ounce) package lasagna noodles 1 (10 ounce) package frozen chopped spinach 3 cooked, boneless chicken breast halves, diced 2 (16 ounce) jars[...]

2 cups uncooked penne pasta 1 pound ground Italian sausage 1 (26 ounce) jar garlic and onion spaghetti sauce (such as Ragu® Robusto® Sauteed Onion &[...]

1 pound dry lasagna noodles 1 1/2 tablespoons olive oil, divided 1 (28 ounce) can Italian whole peeled tomatoes (such as La Valle®) 1 onion, coarsely[...]