Preheat oven to 375 F. Drain and rinse the black beans and let them sit in a colander to dry.
2 14- oz cans black beans
Heat the olive oil in a skillet with the peppers, onion, mushrooms, and garlic; cook until soft.
½ tablespoon olive oil, ⅔ cup red and green bell pepper, ¼ cup red onion, ½ cup diced mushrooms, 2 cloves garlic
In a food processor (or by hand in a mixing bowl) add the cooked vegetables, oat flour, egg, seasonings, and ketchup (if using). Pulse the mixture a couple times to mix or mash with back of fork in a mixing bowl.
¾ cup gluten-free oat flour, 1 egg, ½ teaspoon garlic powder, ¼ teaspoon paprika, ¼ teaspoon black pepper, ¼ teaspoon chipotle powder, 1 tablespoon ketchup
Add the dried black beans and pulse a few more times, leaving some chunks of black beans (this can also be done with the back of a fork).
Scoop the mixture into patties with a large cookie scoop and place on a baking sheet lined with parchment paper. You should get about 8 patties.
If grilling, place patties on grill for 5 - 6 minutes on each side. If baking, bake in oven for 10 - 12 minutes on each side.
Sandwich the patties inside an Angelic Bakehouse sprouted grain bun and top with desired burger toppings.
1 package Angelic Bakehouse Sprouted Grain Buns, Burger toppings of choice