Beef and Bean Casserole

Preheat an oven to 180 C / Gas 4.

Heat the oil in a frying pan over medium heat; cook the onion in the hot oil until softened, about 5 minutes. Crumble the minced beef into the frying pan and cook and stir until completely browned, 5 to 7 minutes. Drain.

Stir the kidney beans with liquid, pineapple with juice, tomato ketchup, dark brown soft sugar, cornflour, mustard powder and salt together in a large bowl. Add the minced beef and onions to the mixture and stir to coat. Pour into a large casserole dish.

Bake in the preheated oven until completely heated through, about 45 minutes.