Simple, comfort food. Wash a medium-sized sweet potato, pierce skin a couple of times with a fork. Bake in an 180C oven for about 45-60 minutes. Remove from oven, halve, and top with a small can of tuna-in-mayonnaise.
I read somewhere that sweet potatoes are healthier than regular potatoes though I honestly can't remember why at the moment. Think it's a different type of carbohydrate or something like that. Will get back to it later when I have the time.