Meat-Free Stuffed Shells

Ingredients (13)

• + 1 (12 ounce) box jumbo pasta shells add to pantry
• ✓ 2 tablespoons butter
• + 1 cup sliced mushrooms add to pantry
• + ½ onion, chopped add to pantry
• + 2 cloves garlic, minced add to pantry
• + 1 (12 ounce) package firm tofu add to pantry
• + ½ cup dry bread crumbs add to pantry
• + ½ (10 ounce) package frozen chopped spinach, thawed and drained add to pantry
• + ¼ cup grated Parmesan cheese add to pantry
• ✓ 1 teaspoon Italian seasoning
• + 1 egg add to pantry
• + 2 cups shredded mozzarella cheese add to pantry
• + 1 (16 ounce) jar spaghetti sauce, or as needed add to pantry