Black bean burgers so good they'll put Five Guys out of business.
Preheat oven to 325°F (163°C). Spread beans evenly onto a lined baking sheet and bake for 15 minutes until slightly dried out.
While beans are baking, add 2 Tbsp ground flax to 6 Tbsp warm water. Stir to combine. Set aside for at least 5 minutes to gelatinize.
Meanwhile, sauté olive oil, chopped pepper, onion, and garlic over medium heat until peppers and onions are soft, about 5-6 minutes. Gently blot some of the moisture out with a paper towel.
Place skillet ingredients in a large bowl, food processor, or blender with the remaining ingredients until Worcestershire sauce. 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. You can use a burger patty maker for this to make things super easy, clean and uniform.
Grill or sauté the burgers on a cast iron skillet for best results.
TO GRILL: Place patties on aluminum foil and grill 8 minutes on each side.
TO SAUTÉ: Preheat cast iron skillet on medium heat, add a small amount of oil to the pan to prevent sticking. Sauté burgers for 4 minutes each side until they start to brown slightly.
Make these burgers ahead of time for a super speedy week night dinner. You can grill, sauté, or bake these burgers straight from the freezer. Simply adding on a few minutes until the burger is warmed through.