Because I was using was is basically and cardboard and tinfoil solar oven, I knew that the cooking times would be at least two-and-a-half times conventional timing, but still faster than a slow cooker. In addition to the insulation used, I had a rice bag preheating for a bottom base, and used craft plastic (available in sewing departments) for the glazing and covered the entire EZ-3 oven. You can also use a large oven bag opened to a single layer, or use two to reduce condensation.
As I've often mentioned, I have no problems 'helping' my solar cooking by preparing foods so that they will cook evenly and faster, the same as one would do for a crock pot meal. Knowing that it would definitely take longer to cook the acorn squash, I peeled and sliced it, first, positioned it in a metal baking pan and added 1/2 cup seasoned juice. Covered it with foil and placed it in an oven bag.
Within two hours, squash is ready and simply mashed in the delicious gravy. Unfortunately, I forgot what the mixture was, exactly, but know there was chicken stock, 3 star anise, salt and pepper, a pinch of cinnamon, and -- then, my mind goes blank. So sorry. But, it was cooked through and very easily mashed with a fork, after removing the star anise and seeds.
It was delicious and proved that the EZ-3 does a great job.