I've been making this for years, when the family ask for 'that chicken and sauce thing, with mushrooms', this is what they are after! Of course, they can all make it themselves now, its one of the first recipes my son asked me for, so that he could make it for his girlfriends family! Although I use skinned de-boned fillets for this, use what is most convenient for you. If I don't have sherry, I use whatevers handy in the cabinet, rum, or vermouth, or my husbands whisky (don't tell him!). Oh, and I usually don't add the mushrooms with the onions, I prefer to add them a few moments later, after I've added the water. That's a personal preference. From one of my oldest and dearest cookbooks, I taught myself to cook from this book, Reader's Digest 'Quick & Thrifty Cooking In South Africa'.