Jack's £10 a week meals: BURGERS 1 x 400g tin of kidney beans. 1 onion, peeled and finely chopped. 1 carrot, grated. 1 teaspoon ground cumin. A handful of fresh coriander, finely chopped. A splash of oil, plus 2 tablespoons to fry the burgers. 1 heaped teaspoon flour, plus another to shape the burgers.