There’s really nothing easier to cook in a Sun Oven than baked potatoes. Well scrubbed potatoes can be placed along side a pot or even on the lid. They’ll come out just fine. They don’t even need to be pierced with a fork. However, when baked potatoes are the only thing I’m cooking in the Sun Oven I like to wrap them in aluminum foil and put them in a lidded roasting pan (the rack is optional). This way the steam gets trapped in but the heat is not deflected by the shiny foil. The cooking time will vary depending on the size of the potatoes but 1 1/2 to 2 hours on a nice sunny day should do the trick.