"Though the main flavor of this marmalade is orange, the addition of some lemons makes it less cloyingly sweet. You’ll notice there’s no added pectin; it comes from the skin…..."
INGREDIENTS
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2 lb. navel oranges (about 5 medium)
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1 lb. lemons (about 3 large)
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6 cups filtered or spring water
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5 cups granulated sugar
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2 Tbs. distilled white vinegar (optional)