Next up are vegetables with colors from the rainbow. However, feel free to add any vegetables that you like. Add 1 tsp of diced mushroom, 1 tsp of diced onion, 1 tsp of diced orange bell pepper for color, and for some greens, 1 tsp of diced broccoli. I know most people do not add broccoli to their pizza, but it’s so good for you, and it actually tastes good. Add 1 tsp of every vegetable on top of each tilapia fillet.