Quick and cheap kidney bean burgers

For quite some time now we have been trying to include more vegetarian meals in our menu, for both health and budget reasons. These bean burgers are great - we had them for dinner last Tuesday, and even S, who said he hadn't had ever tasted veggie burgers he liked, said these were actually nice.

It was based on a recipe from THIS blog.

Ingredients (makes 6 good size burgers):

2x 400g tins of kidney beans
1 large onion
2 carrots
2 teaspoons cumin
2-3 tablespoons flour
Fresh or dried parsley
Salt and pepper
Oil for frying

Method:

Drain and rinse the beans, then cook them in a pan of water for 10-15min until soft.
Meanwhile, roughly chop the onion, grate the carrot, and fry both in a pan using just a little oil, until soft. Add the cumin and parsley, mix well.
Put the cooked and drained beans, along with the onion/carrot mixture, in a food processor. Mix until it turns into a fairly smooth paste. Transfer into a bowl, add salt and pepper and the flour, mix well.
Optional step: Place the mixture in the fridge for a couple of hours, this will help it firm up. Otherwise you might need to add a bit more flour.
When ready, form six patties out of the mixture, sprinkle both sides with a bit more flour and fry, turning once, until both sides have browned. This doesn't require a long cooking time, as all the ingredients are already cooked.

Enjoy in a hamburger bun with all the trimmings, or with rice and a salad.