We took our Solar Oven to the craft show in mid October.  Very early, about 8:30 am, I put lunch on to cook.  I took the easy way out.  I used a frozen Crock Pot  meal – pot roast and veggies.  It comes with a sauce packet to make gravy.   Just add water.  It drew some curious looks from a few other vendors, but mostly no one even noticed my cooker sitting quietly behind the canopy.  Around 1:00 p.m., I put some dinner rolls in a plastic bag, and put them into the cooker to warm up. At 1:30, we enjoyed a hot delicious lunch of pot roast, warm rolls, and fruit salad from the cooler.