A lot of grocery stores have kitchens inside of them, especially the larger ones, so maybe that is a possibility? Could easily start off small to gauge interest

A lot of grocery stores have kitchens inside of them, especially the larger ones, so maybe that is a possibility? Could easily start off small to gauge interest before expanding. Or you could market the product inside of grocery stores, but do the actual cooking at the local chef's restaurant? Or yep like you said, rearrange some areas temporarily during off-hours.