INGREDIENTS
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2 pounds flank steak or tri-tip, cut into 8-ounce pieces
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4 tablespoons black peppercorns, lightly cracked
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2 tablespoons kosher salt
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3 tablespoons extra-virgin olive oil
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1/4 cup red onion, minced
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1 tablespoon garlic, minced
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1 cup Cabernet Sauvignon
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1/2 cup balsamic vinegar
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2 tablespoons brown sugar