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Use Every Last Bit
Nose-to-tail cooking, in which you use every part of a plant or animal, may be a chef-y buzzword, but it's especially relevant to anyone shopping at a farmers' market. For instance, root vegetables there are almost always sold with the stems attached; whereas, they're often sold without stems at supermarkets. And you'll get the most for your money if you use every part of what you buy. Two brilliant ideas: Put beet greens on grilled cheese sandwiches and turn carrot tops into pesto.