Sweet Potato and Kale Pizza with Balsamic Drizzle

gluten free pizza crust (I made mine from a gluten free pizza crust mix)

large sweet potato, peeled and chopped into large chunks

salt

ground black pepper

unsweetened almond milk

kale, washed, dried and stems removed

medium onion, sliced thinly

mozzarella cheese

balsamic vinegar

coconut sugar (optional)