Black Bean Patty

1 bag (16 oz.) dried black beans
8 oz. vegan cheddar cheese, cut in 1-inch cubes
1 medium Spanish onion, diced finely
½ cup corn kernels
1 red bell pepper, diced finely
1 green bell pepper, diced finely
1 jalapeño pepper, minced
1 tsp. ground cumin
½ tsp. chili powder
½ cup fresh cilantro, finely chopped
½ tsp. garlic powder
½ cup oat bran
¼ cup rice flour
¼ cup water
1 tbsp. sea salt
Grape seed oil
6 multigrain buns, toasted