INGREDIENTS
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1 TEASPOON KOSHER SALT, PLUS MORE FOR THE POT
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3 LARGE RED POTATOES, CUT INTO 1 1/2-INCH CHUNKS (ABOUT 1 1/4 POUNDS)
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1 POUND GREEN BEANS, TRIMMED
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3 TABLESPOONS RED WINE VINEGAR
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1/3 CUP EXTRA-VIRGIN OLIVE OIL
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FRESHLY GROUND BLACK PEPPER
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1 ENGLISH CUCUMBER, SLICED INTO 1/4-INCH-THICK HALF-MOONS
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1/2 MEDIUM RED ONION, THINLY SLICED