If you have an outdoor barbecue grill with a cover that closes over the top of the grill, you can turn it into an outdoor oven. Why would you want to do that? I can think of a few reasons! To have another baking oven on holidays or other occasions when you really use it. To have an alternative on days you don’t want to heat up the kitchen. To expand your camping-out cooking repertoire. To have a way to cook and bake during power outages …
To have an alternative appliance should electric rates spike.