Most food can be cooked ahead and reheated. Golden rules for health and hygiene are: cool quickly, store chilled, reheat thoroughly. Reheating is often a much better option than trying to keep something warm and the recipes in this book will tell you when you can do this.
If you have frozen a cooked dish, you can normally reheat it in a microwave or oven straight from the freezer. If you defrost and reheat in a microwave, make sure all food is covered so it cooks evenly. You also do not want bits of food shooting off and covering the insides of your machine.