Hearty vegetarian baked pasta shells stuffed with creamy ricotta, mozzarella, Parmesan, sautéed spinach, and toasted pine nuts, topped with marinara sauce and baked until bubbly.
Cook a few extra shells as some may break during boiling. To toast pine nuts, spread on a baking sheet and bake at 350°F for 5-7 minutes until golden. Use fresh spinach for best texture; frozen can be substituted but must be well-drained.