Bishul Akum

If one goes to a restaurant, and the goy cooks the food with the mashgiach just turning on the fire (Ashkenazi standards) can a Sephardi eat food that is cooked from this utensil in the future (he requests that a jew will stir the food for him). Since the utensil was already cooked with only a goy in the past, it needs to be koshered?

Yes, darkei Moshe brings that as long as someone permits such food the utensils are fine