Preheat oven to 200C
Place the unpeeled sweet potatoes on a tray and make holes on the sweet potato using a sharp knife
Bake the potatoes in the oven for 60-75 minutes until they are cooked through
Once cooked take it out of the oven, before it cools down, peel the skin and scoop out the flesh of the sweet potatoes
Using a grater grate the sweet potato or mash it using a masher
Add flour, egg, salt and pepper into the sweet potato and lightly knead the dough on a work surface dusted with flour
Roll it out to a long log shape and cut into 6 equal portions
Taking one portion at a time roll it to a long log and cut into smaller pieces
Using a fork press the dough pieces on the fork and using your thumb roll it back to form small gnocchis