In a crock pot, quarter 1-2 onions and thinly slice 1 cored apple. Add 1/2 cup of light wine or cider and chicken better-than-bullion or super-reduced chicken stock. Oh, and per Nancy LC, I suppose you should also add 3-4 lbs boneless chicken. I like a mix of thighs and breasts. Cook until done, I like 6-8 hours.
Don't stir or anything.

Cool. Pull out the chicken pieces and boil down the leftover juices until they thicken. If you don't want the carbs, pick out the apple slices and onion chunks. If it doesn't matter, puree them to thicken the sauce. Add salt and pepper to taste. Add extra xanthan or thickener to make it gravy. Add the chicken back in crumbled to pieces.

The perfect 'sick' food.