This hearty spaghetti squash lasagna recipe is a great way to enjoy a classic Italian dish without the carbs. Using a food processor to shred the spaghetti squash makes it quick and easy to prepare. The layers of tender spaghetti squash, rich tomato sauce, and creamy ricotta cheese are a match made in heaven. Topped with mozzarella cheese and baked to perfection, this dish is sure to be a crowd-pleaser.