1 can (4 ounces) mushroom stems and pieces, drained
1 package (10 ounces) frozen chopped spinach, thawed and well drained
1 package (16 ounces) spiral pasta, cooked and drained
2 large eggs, beaten
1/2 cup soft bread crumbs
2 cups shredded cheddar cheese
1-1/2 cups shredded mozzarella cheese
In a large skillet, cook beef with onion, salt, pepper and garlic powder until the onion is tender; drain. Stir in the spaghetti sauce, tomato sauce, tomato paste and mushrooms. Bring to a boil; simmer, uncovered, for 10 minutes.
Combine the spinach, noodles, eggs, bread crumbs and cheddar cheese; place half in a greased 13x9-in. baking dish. Top with half of meat sauce. Repeat layers.
Cover and bake at 350° for 40-45 minutes or until hot and bubbly. Sprinkle with mozzarella cheese; let stand for 10 minutes.