The sky is the limit! Here are some of my suggestions: 1. Vegetables of your choice - carrots, broccoli, onions, peppers, or any other vegetables of your choice. 2. Dried or fresh oregano in place of basil. 3. Red chili flakes for that extra kick. 4. Cheese of your choice or, if you want to keep it entirely vegan, nutritional yeast for that added umami oomph! 5. My meat-eating friends - you can add meat of your choice too!