Heat your cast iron skillet over medium heat with canola oil.
Wash and peel your sweet potatoes then cut into medium cubes
Add your cubed sweet potatoes to the heat cast iron skillet in single layer and leave untouched for 3-4 minutes.
Flip sweet potatoes on over and leave untouched for another 3-4 minutes. Repeat on all sides of sweet potatoes until they are golden brown and fully cooked.
Remove sweet potatoes from skillet and keep on the side.
Add diced onion and bell pepper to the skillet and sauté for a few minutes flipping occasionally until golden brown.
Return the sweet potatoes to the skillet and incorporate with the vegetables.
Rinse and drain the black beans, shake dry and add to the skillet.
Season everything with smoked paprika, thyme, cumin, salt, and pepper.
Mix well and heat through in the skillet.
Serve hash warm with avocado, fried egg, or green onion garnish.