01 - Heat 1 tablespoon olive oil in a large skillet over medium heat. Add mushrooms, onion, garlic, carrot, and bell pepper. Sauté until vegetables are soft and moisture has evaporated, about 8 minutes. Let cool slightly.
02 - In a large bowl, mash the black beans with a fork or potato masher, leaving some texture.
03 - Add the sautéed vegetables, oats, egg, breadcrumbs, soy sauce, smoked paprika, cumin, salt, pepper, and parsley to the beans. Mix until well combined.
04 - Let the mixture rest for 10 minutes so the oats and breadcrumbs absorb moisture.
05 - Divide the mixture into 4 equal portions and form into burger patties.
06 - Heat remaining 1 tablespoon olive oil in the skillet over medium heat. Cook patties for 4–5 minutes per side, until golden brown and heated through.
07 - Serve on burger buns with your favorite toppings.