Slice some large mild Spanish onions. Cover them with butter, and set them over a slow fire to brown. Then add salt and cayenne pepper to your taste, and some good brown gravy of roast meat, poultry or game, thickened with a bit of butter rolled in flour that has first been browned by holding it in a hot pan or shovel over the fire. Give it a boil, skim it well, and just before you take it off, stir in a half glass of port or claret, and the same quantity of mushroom catchup.
Use this sauce for roasted poultry, game, or meat.