Our household includes one diabetic and one with Lupus. Understanding the inflammatory nature of some foods helps. Terry Wahls has a couple of books out, one with theory and one as a cookbook. Perhaps you can find a few recipes that make sense to you. Basically, avoiding processed foods, sugar and high fructose corn syrup and aspartame are key. Especially for fibromyalgia which is affected by food intolerances. Keep a diary for a few weeks to help identify them. A diabetic or Meditteranean cookbook also has good advice. We stay on the low glycemic side of foods. There is also the AIP diet if you want to change your diet entirely.