Healthy pizza made from potatoes without flour

I made a healthy potato pizza without worrying about diabetes.
3~4 boiled potatoes,half an onion,Spinach,6 cherry tomatoes,
3 eggs,150g mozzarella cheese,0.5T of garlic powder,50ml of milk,Cream cheese 2T, 30g butter,Parmesan Cheese,Olive oil, salt, pepper