Lasagna Roll-Ups

Ingredients

• 12 uncooked lasagna noodles
• 1 lb lean ground beef
• 1 large onion, chopped
• 1 (14 ounce) jar spaghetti sauce
• 1 (8 ounce) can mushroom stems and pieces, undrained
• 1 (15 ounce) container ricotta cheese
• 1 (10 ounce) package frozen chopped spinach, thawed and squeezed to drain
• 1 cup shredded mozzarella cheese
• 12 cup grated parmesan cheese
• 1 teaspoon salt
• 14 teaspoon pepper
• 1 teaspoon garlic powder