420. Another way.—Prepare as above; add a little flour and a gill of broth, a few raw mushrooms, stir continually to prevent burning, add a few spoonfuls of cream and serve; if any remain, do them au gratin, that is, put them in a pie-dish or flat plated dish, brown, bread-crumb over, add a little broth, put into an oven, and, when very hot, serve.