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You grabbed a loaf of bread the last time you were at the grocery store, but now it’s rock hard. So, what to do with stale bread? This common scenario is annoying when you’re hungry and craving a sandwich, but it’s also a huge waste of food and money if you throw the stale loaf away. The USDA estimates that 30% to 40% of the country’s food supply is wasted, with food waste occurring at every…