Wash two cups of lentil beans. Soak them in 2 cups of water and leave it for 30 minutes.
Grind the flaxseed.
Into a blender, put all the ingredients - soaked lentil beans with water, ground flaxseed, salt, and pepper. Blend until smooth. Have the mixture be roughly blended.
Add a cup of rice flour and make it into a dough.
Shape the dough into the size of patties you want.
Heat the pan. Once heated, pour some cooking oil into the pan and distribute it well.
Put the patties on the pan and cook one side. Once one side of the patty is cooked, cook the other side. Serve it hot with ketchup or soy sauce.