Leave the skin on baby potatoes, and simply wash and chop them into small pieces. I didn't do this scientifically, or to any definite shape.
Peel the sweet potatoes, and chop them up in the same way as the baby potatoes.
Put them all into the Actifry, and drizzle on two spoons of the oil, and mix in the bullion powder. For this, I used what I had, which was a tub of red wine casserole powder. Just use what you have, and if you're out of something, crumble in a stock cube or two.
Select around 20 minutes on your machine, or until your baby potatoes are fully cooked.