For an extra layer of flavor, consider adding a sprinkle of garlic powder or smoked paprika to the cauliflower before roasting. Experiment with different cheese combinations! Gruyere, Monterey Jack, or even a sprinkle of Parmesan would be delicious. If you don't have beefsteak tomatoes, any ripe tomato will work well. You can also add a thin layer of pesto or a drizzle of balsamic glaze for added depth. To make this recipe vegan, use vegan butter and cheese alternatives.