INGREDIENTS
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2 tablespoons extra-virgin olive oil
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2 large yellow onions (about 1 1/2 pounds), quartered and thinly sliced
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Kosher salt
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6 tablespoons apple cider vinegar
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1/4 cup fresh orange juice
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2 to 3 teaspoons sweet-hot German mustard
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Nut crisps or pita crackers (about 60), for serving
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1 1/2 cups fresh ricotta cheese
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1 pint fresh figs, stemmed and sliced