Delish, and so, so sweet!
Preheat oven to 200C (400 F). Wash a very large sweet potato well. Place it directly on the rack in the middle of your oven. Bake for 45 minutes to 1 hour, until a fork pierces it easily.
Carefully remove potato, slice it lengthwise, and scoop out center into bowl. Smash in 1 tsp light vegan margarine, 1 tsp salt, and 1/4 tsp pepper.
Will easily serve 2.