Drain and rinse all caned beans Lightly brush portobello mushrooms Chop mushrooms Heat some lightly flavored oil in a skillet over medium heat adding mushrooms once heated and cook until soft add black beans, chick peas, half a can of lentils oats and mushrooms into blender. Pulse quickly to mixpeel and chop beetadd chopped beet to blender. Pulse to mixadd tapioca starch, marmite, nutritional yeast, and liquid smoke to blender and pulse pour mixture into bowl and add remaining lentils heat a skillet on medium high heat adding some oil make a small ball with burger mixture place in skillet and press down using spatula making burger pretty thincook until patty is firm