Preheat oven to 220°C. Spread 2 tbsp of aioli over each pizza base. Sprinkle one handful of mozzarella over each pizza and top with spinach, sliced onion, mushrooms, shredded chicken and bacon pieces. Sprinkle remainder of mozzarella.
Cook for 15 minutes or until pizza base is golden. Zig zag extra aioli over pizzas. Slice into 8 pieces to serve.