These were lovely and a hit with the kids.
2 cups cooked beans (or 1 can)
1 onion, roughly chopped
1/2 cup rolled oats
salt and pepper to taste
1 tbsp ketchup
1/2 cup cheese
Place the beans, onion, oats, cheese and egg in a food processor. Blend until chopped and mixed. Add a little ketchup if the mixture seems dry but not too much - you don't want it runny. Add the cheese and briefly process to combine. Leave to rest for a few minutes.
Heat a pan to a medium heat with the cooking fat of your choice (I used ghee). Shape the mixture into burgers with your hands and fry on both sides until golden and crispy.
I think next time I will add another 1/4 cup of Parmesan to the cheese (I used cheddar) to make the taste a little stronger. If you are concerned about soaking grains then you could substitute the oats and egg with a cup of cooked porridge.