Sweet potatoes doughnuts

So I bought myself a little new gadget, a little waffle maker that also has some plates to cook doughnuts in. I love doughnuts and I just couldn't help myself when I saw this little machine. Last Saturday was Ali 3rd birthday and I decided to test the little thing there and then. Me been me though, been a children party and all, I try to make the healthier version of those little parcels of heaven. Ingredients: 1 medium sweet potato mash 250ml warm milk 500g flour 1 egg + 1 y