01 - Heat 1 tablespoon of olive oil in a skillet over medium heat. Add the chopped onion, grated carrot, and diced bell pepper. Sauté for 3 to 4 minutes until softened. Add the minced garlic and cook for 1 additional minute until fragrant. Remove from heat and let cool slightly.
02 - Place the drained and rinsed black beans in a large mixing bowl. Using a potato masher or fork, mash the beans to a coarse consistency, leaving some chunks intact for added texture.
03 - Add the sautéed vegetables, rolled oats, breadcrumbs, egg, smoked paprika, ground cumin, salt, black pepper, and chopped parsley to the mashed beans. Stir until all ingredients are evenly distributed. If the mixture is too wet, incorporate additional breadcrumbs one tablespoon at a time. If too dry, add a splash of water.
04 - Divide the mixture into 4 equal portions. Shape each portion into a firm patty approximately 3/4 inch thick, pressing the edges to prevent crumbling during cooking.
05 - Heat the remaining 1 tablespoon of olive oil in a skillet over medium-high heat. Cook the patties for 4 to 5 minutes per side until golden brown and heated through. Alternatively, grill the patties over medium heat for similar timing.
06 - Toast the burger buns if desired. Layer each bun with a cooked patty and your choice of lettuce, tomato slices, pickles, onion, cheese, and condiments. Serve immediately.