The best part of frittata is that you're meant to use it as a "clear-the-fridge meal." In other words, go wild with the fillings! Try adding low-carb vegetables like asparagus, bell peppers, mushrooms, kale, zucchini, spinach, and baby tomatoes. I also love using chopped sun-dried tomatoes (in moderation). You can even add ground meats, seafood, and a variety of cheese blends; the options are unlimited!