Currently one-third of all the food produced in the world is thrown away. Recognizing that some creativity is needed to turn this trend around, Christine Tizzard explains how to cook a hearty Pot Roast and turn the leftovers into a Savory Pie, and then use the bones to make a stock to freeze for when you next make soup. Other recipes here tell you how to get the most out of rice, over-ripe fruit, and banana peels, plus other creative uses for extra foods: making pet treats, beauty aids, and home cleaning products.