Preheat oven to 400 degrees Fahrenheit. Pulse the cooked and peeled sweet potato and oats in a food processor until very fine. Add the egg, garlic powder, and salt; pulse again until combined. The mixture should resemble a loose dough or thick batter.

Transfer the mixture onto a parchment-lined baking sheet or pizza pan. Shape into a crust about 1/4 to 1/2 inch thick. Bake for 25-30 minutes until dry to the touch.

Remove from oven, let cool slightly, then flip the crust onto a new parchment sheet with the baked side down. Brush with olive oil and bake for another 5-10 minutes to crisp the edges.

Add your favorite toppings and bake for an additional 10 minutes until cheese (if using) melts and toppings are hot.