Keto Spaghetti Casserole is the best comfort food you can make. It’s made with browned beef or ground turkey, Italian seasonings, marinara sauce, spaghetti squash, garlic, onions, and four kinds of cheese. It's a keto-friendly version of the amazing Million Dollar Spaghetti. And it’s gluten-free, grain-free, low-carb, and THM S.