Preheat the oven to 375°F & spray muffin tins with cooking spray and set aside.
In a large bowl, whisk together the flour, garlic powder, onion powder and baking powder then add the milk and egg, and whisk to combine.
Stir in the mozzarella and vegetables (or other toppings) and let set for 10 minutes.
Divide the batter into the muffin tins. Take the remaining 1/2 cup mozzarella and sprinkle a little on each one. Pop in the oven and bake until puffed and golden, 20 minutes. Serve with tomato sauce for dipping.
12 servings