INGREDIENTS
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6 cups chopped green pepper
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6 cups shredded pickling cucumber
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2 1/2 cups minced/shredded onion
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4 cups apple cider vinegar, divided
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2 cups sugar
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2 tablespoons kosher salt
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2 tablespoons mustard seed
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1 teaspoon celery seed
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1/2 teaspoon red chili flakes