MEANWHILE, MAKE THE BACON-MUSHROOM SAUCE: In a large skillet over medium flame, cook the diced bacon with the mushrooms and thyme sprigs until the bacon is crisp and the mushrooms tender. Stir in the shallot, garlic, and a pinch of crushed red pepper. Pour in the brandy and simmer until the brandy is reduced by half. Pour in the stock and cream. With a table fork, mash the butter and the flour. Sprinkle into the sauce and heat gently, stirring a time or two, until thickened. Remove thyme sprigs. Taste and season to taste with salt and pepper. Remove from heat. If goose is not yet done, cover to keep warm or reheat gently when needed. When seasoning this sauce, remember it will go over a larger amount of food it will need to flavor; you may want to increase the salt and pepper a bit extra to compensate just as you would for gravy and mashed potatoes. Or try a sample and see what you think. You can also pass the salt and pepper at the table if needed.