Do not rinse mushrooms under water, as they can absorb water and turn soggy while baking. Mushrooms can release a lot of water. A small cross on the mushroom cap will help drain excess liquids from the mushrooms. A further step would be to place mushrooms on an oven-safe wire rack on top of the rimmed baking tray or drain the liquids from the tray after the first bake. This ensures mushrooms don’t sit in the water while it bakes. Use thick pizza sauce. Avoid using thin sauce and cheese like fresh mozzarella and burrata as they have a lot of liquids.