GFCF Macaroni and Cheese

One of the hardest things to give up after the family went gluten, casein and soy free was my mom's macaroni and cheese. Over the years I tried several different recipes, some fancier than others (4 cheese, anyone?), but none held a candle to my mom's. I guarded her recipe closely, always making sure I knew where that stained 3x5 inch recipe card rested. I gave out the recipe sparingly, but