Wash the pumpkin thoroughly, peel it, and slice it thinly.
Cut the pizza topping ingredients such as onion, bell pepper, and chicken breast into bite-sized pieces.
Steam or microwave the pumpkin slices until cooked, then mash them.
Spread the mashed pumpkin evenly over the pizza dough.
Add the prepared toppings and mozzarella cheese on top.
Bake in the oven at 200°C (392°F) for 12 to 15 minutes until done.