Add mushrooms and onions to mixture and ladle into a large ceramic or glass pot or casserole dish with a lid, layering on sprigs of rosemary and thyme. Add lid, place pan into oven, and bake 1 hour.
The roast recipe is winning rave reviews all over Australia ... Another responded: “I used two jars. One and a half in pot, the other half warmed in microwave and tipped over plated meat.