INGREDIENTS
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1 4 -to-5-pound flat-cut beef brisket, trimmed of excess fat
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Kosher salt and freshly ground pepper
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2 tablespoons extra-virgin olive oil
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2 tablespoons tomato paste
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1 cup dry red wine
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1/2 cup red wine vinegar
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1 tablespoon pickling spice, tied in cheesecloth with twine
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1 cup low-sodium beef broth
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6 carrots, quartered crosswise
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4 stalks celery, quartered crosswise
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2 leeks, halved lengthwise and sliced 1/2 inch thick
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12 gingersnap cookies, crumbled
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Chopped fresh parsley, to taste