Easy Pasta Dish

1/2 pound ground beef
1 onion, minced
2 cups cooked macaroni
1 can sweet corn
4 tablespoons tomato ketchup (more if you like)
Grated cheese
Oil (for frying)

Heat oil in pan and fry onion until soft. Add the beef and cook until browned. Add macaroni, sweet corn, ketchup and mix well. Put mixture into a casserole dish. Cover the top with grated cheese. Bake in a hot oven until hot and the cheese has melted.