01 - Preheat oven to 425°F. Line a pizza pan or baking sheet with parchment paper.
02 - Place the peeled and cubed sweet potatoes in a medium saucepan, cover with water, and bring to a boil. Cook until fork-tender, about 10 minutes. Drain and let cool slightly.
03 - Mash the sweet potatoes with a potato masher until completely smooth. Allow to cool to room temperature.
04 - In a mixing bowl, combine the mashed sweet potatoes, egg, flour, Parmesan cheese, salt, garlic powder, and black pepper. Stir until evenly incorporated.
05 - Transfer the mixture onto the prepared pan and press into a 12-inch round or oval shape, approximately 1/2 inch thick.
06 - Bake for 15–18 minutes until the crust is set and just beginning to turn golden.
07 - Remove from the oven. Spread the pizza sauce evenly over the crust, then layer with mozzarella, pepperoni, and sliced red onion. Sprinkle with dried oregano.
08 - Return to the oven and bake for another 10–12 minutes until the cheese is fully melted and bubbly.
09 - While the pizza bakes, gently heat the honey and red chili flakes in a small saucepan over low heat for 2–3 minutes. Do not boil. Remove from heat and let steep.
10 - Remove the pizza from the oven and let rest for 3–5 minutes. Drizzle the hot honey over the top just before slicing and serving.