Prepare the mushrooms: Tear up the mushrooms. Heat 1 tbsp oil in a wide-bottom pan over high heat.
Add the mushrooms and place a pot on top to compress them. Cook for 4 minutes, stirring occasionally.
Add 1 tbsp tamari to the mushrooms and cook for an additional minute until all the tamari has been absorbed.
Make the burger mixture: In a large bowl, combine the cooked quinoa, drained and rinsed kidney beans, nutritional yeast, smoked paprika, chilli powder, gram flour (or vegan protein powder), and cooked mushrooms. Using a potato masher or your hands, mash the beans and mix all the ingredients together until well combined.
Form the patties: Shape the mixture into 3 equal-sized patties.
Cook the patties: Using the same pan you cooked the mushrooms in, heat 2 tbsp oil over high heat. Fry the patties for 2 minutes on each side until both sides are charred and golden.
Assemble the burgers: Slice the tomatoes and gherkins. Spread some vegan mayo on the bottom bun and pesto or ketchup on the top bun. Place a lettuce leaf on the bottom bun, followed by the burger patty. Add a spoon of pesto or ketchup over the burger patty and spread it out. Top with a slice of tomato and some gherkin slices, then finish with the top bun.
Enjoy your homemade high-protein wholefood burger!