Preheat oven to 325°F (163°C). Spread beans evenly onto a lined baking sheet and bake for 15 minutes until slightly dried out.
Meanwhile, sauté olive oil, chopped pepper, and onion over medium heat until peppers and onions are soft, about 5-6 minutes. Gently blot some of the moisture out. Place in a large bowl or in a food processor with the remaining ingredients. Stir or pulse everything together, then add the black beans. Mash with a fork or pulse the mixture, leaving some larger chunks of beans.
Form into patties– about 1/3 cup of mixture in each.
To bake: Place patties on a parchment paper lined baking sheet and bake at 375°F (191°C) for 10 minutes on each side, 20 minutes total. To grill: Place patties on greased aluminum foil and grill 8 minutes on each side. Heat temperature is personal preference as all grills differ. Generally, black bean burgers should grill on medium-high heat about 350°F (177°C) – 400°F (204°C).
Serve with your favorite toppings and enjoy!
Make ahead tip: Cooked or uncooked black bean burgers freeze wonderfully! Stack between parchment paper in a freezer container or zipped-top bag. Thaw in the refrigerator and reheat to your liking or, if uncooked, cook according to instructions. If desired, you can skip thawing and reheat/cook from frozen for an extra couple minutes.