Sweet Potato and Kale Pizza

small sweet potato, sliced into thin rounds

medium red onion, sliced

garlic, minced

Olive oil

Kosher salt and black pepper

ball whole-wheat pizza dough

grated mozzarella cheese (about 6 ounces)

kale, removed from stalks, washed, dried, and chopped

freshly grated Parmesan cheese

goat cheese