Preheat the oven to 400°F (200°C) and line a rimmed baking sheet with parchment paper or foil.
Cut the sweet potato lengthwise into 2 halves, then place over the baking sheet. Bake for 30 to 40 minutes, or until soft.
Line another baking sheet with parchment paper and grease the surface with oil to prevent sticking. Place the baked sweet potato over it.
Place the baked sweet potato between two sheets of parchment paper. Using a rolling pin or the bottom of a heavy pan, gently smash it down. Then, carefully roll it out into a thin, even, round pizza shape. Remove the upper piece of parchment paper.
Top the crust with pizza sauce, shredded mozzarella and your favorite toppings.
Transfer your pizza back to the oven and bake at 350°F (180°C) for 8 - 12 minutes, or until the cheese has melted.
Serve warm and enjoy.