Most people enjoy the juicy red flesh of a watermelon and toss the rind straight into the trash. But the pale green and white part just beneath the outer skin is actually edible and contains useful nutrients and plant compounds that are often overlooked.
Watermelon rind has a mild, refreshing flavor and a crisp texture. Unlike the sweet red flesh, the rind is much less sugary, which makes it an interesting ingredient for savory recipes, pickles, salads, stir-fries, soups, and homemade preserves.
One of the compounds found in watermelon rind is citrulline, an amino acid that the body can convert into arginine. Arginine plays a role in the production of nitric oxide, a molecule involved in normal blood-vessel function and circulation. Watermelon rind also provides small amounts of vitamin C, potassium, and other nutrients, although it should not be considered a miracle food or a treatment for medical conditions.
The easiest way to enjoy watermelon rind is to remove the tough outer green skin and keep the pale portion underneath. Wash the watermelon thoroughly before cutting, then slice away the hard exterior. Cut the remaining white rind into thin strips or small cubes.
One of the most popular ways to use it is as a quick pickle. Place chopped watermelon rind in a clean jar and add a mixture of vinegar, water, a little salt, and your preferred seasonings. Garlic, mustard seeds, black peppercorns, dill, or chili can add extra flavor. Refrigerate the finished pickles and allow the flavors to develop before serving.
Watermelon rind can also be cooked. Cut it into small pieces and add it to stir-fries, curries, soups, or vegetable dishes. Because the rind has a relatively mild flavor, it easily absorbs the flavors of herbs, spices, sauces, and marinades.
Another option is to blend small amounts of tender watermelon rind into smoothies. Combining it with the red fruit, lemon, cucumber, ginger, or other fresh ingredients can create a refreshing drink while reducing food waste. If the texture is too fibrous, peeling away more of the outer green layer and blending thoroughly can help.
The rind is also useful in homemade preserves. When cooked slowly with fruit, citrus, spices, and a sweetener, it can take on a pleasant texture and absorb the flavors around it.
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