Toppings Note: Very moist vegetables will release water when baking and can make your pizza soggy. So, choose vegetables that don't release too much juice, or pre-roast the veg to concentrate the vegetables. It's fine to use some wetter vegetables (ex: tomatoes, mushrooms), just don't overdo them, and combine with other toppings that are dried (ex: sliced onions, chopped bell peppers, olives).