Preheat your oven to 425°F (220°C) and line baking sheets with parchment paper.
Arrange mini pizza crusts on the sheets. Spread pizza sauce over each, leaving a border.
Sprinkle shredded mozzarella generously over the sauce.
Decorate with toppings: create Mummy Pizzas with string cheese strips, Spider Web Pizzas by swirling extra sauce, or Jack-o'-Lanterns using bell peppers.
Mist baking sheets with olive oil spray before baking for 8-12 minutes until golden brown.
Allow cooling for a few minutes before garnishing with fresh basil and serving warm.