In a small saucepan, add quinoa, water and bring mixture to boil. Add salt to taste and simmer on low heat for 20 min. with lid on. Meanwhile, start preparing the remaining patty base
In a medium mixing bowl pour black beans. Using fork or back of wooden spatula mash beans. Do not make a complete paste but leave some partially broken pieces
To the mashed beans, add finely diced green pepper, ¼ cup diced onion, bread crumbs, cooked quinoa, egg white, paprika, worcestershire sauce, salt and pepper to taste. Mix all the ingredients. Divide the mixture into 6 equal parts and then form into patties
Heat the skillet on medium heat and add oil to coat the pan. Cook prepared patties for 3-4 min on each side
In a small mixing bowl add avocado pulp, finely chopped onion, salt and pepper according to taste. Mash avocado using fork or small beater to combine well.
Now assemble the burger. On one side of burger roll place some lettuce leaves, cooked patty, spread some cheese, 1 thick slice of tomato, roasted red pepper. Finally top with avocado sauce and serve with your choice of fries as a side. Enjoy your freshly prepared black bean veggie burger