Sweet Potato, Black Bean, and Goat Cheese Pizza

medium sweet potato, sliced very thinly (if doing by hand, aim for 1/4-inch or less, if possible) and each slice quartered

Olive oil

Salt

Your favorite pizza dough (or mine ), ready to stretch and bake

Olive oil, for brushing

shredded mozzarella

large green onion, thinly sliced and dark green tops reserved for topping

Prepared sweet potato slices

small green bell pepper, core and seeds removed, thinly sliced

cooked black beans, drained and rinsed

crumbled goat cheese

Small handful of grated Parmesan

Flour, for dusting surface

Coarse cornmeal, for dusting surface