Mix flaxseeds and water in a small bowl and set aside for 5-10 minutes.
In a large skillet, heat 1 tbsp of olive oil over medium heat and add the onion, red pepper and garlic until the red pepper begins to soften,about 4-5 minutes. Remove from heat and add in the spices.
In a food processor, pulse the black beans and rolled oats, until they form a sticky mixture. Add the rest of the dry ingredients and the lemon juice and flax egg and pulse again.
Shape into patties about 1/2 cup big and refrigerate for half an hour. The burgers need to be chilled enough to hold together when they are cooked.
Heat olive oil over medium heat in a non-stick skillet and cook patties for about 5 minutes on each side, until slightly browned and the pattiesare cooked all the way through. Serve with buns, vegan mayo, lettuce, and thinly sliced tomato