Preheat oven to 400 degrees. Skin sweet potato and cut off ends. Poke with fork all around 7-10 times. Wrap in foil. Add to the preheated oven and bake for 45 minutes.
Heat 1 tablespoon of oil in saute pan over medium heat. Dice red or white onion and add to saute pan. Add in garlic and cook for 2 minutes. Add in salsa verde and continue to saute for 3-5 minutes. Set aside.
Once the sweet potato is done cooking place in large bowl & mash. Add rinsed & drained black beans to the mashed sweet potato & mash together. Add in sauteed onion, garlic and salsa to the mixture. Mix in salt, ground cumin, cayenne pepper & bread crumbs until well combined.
Divide mixture into 5 portions. Form mixture into a ball in hands and smash down to flatten into patties.
Heat 1 tablespoon of oil in a large saute pan on medium heat. Once the oil is hot, add 2-3 patties to the pan and heat on each side for 5 minutes. Repeat until all patties are cooked.
Serve with roasted vegetables, top with avocado & enjoy! Feel free to serve this burger in a lettuce wrap or burger bun if desired.