Preheat oven to 400 degrees.
Add oil and butter to a hot casserole. Sweat carrots, onions, and celery and cook until soft, but without color. Remove from heat and add marjoram and thyme. In a bowl combine focaccia, vegetables, hot stock, cider, and chestnuts. Season with salt and pepper to taste. Mix well. Place in covered baking dish and bake for 30 minutes
recipe courtesy of Stephen Kalt