INGREDIENTS
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One 2-pound boneless beef brisket
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1 large white onion, quartered
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Kosher salt
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3/4 cup olive oil
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6 tablespoons distilled white vinegar
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1/4 cup fresh lime juice
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1/4 cup minced red onion
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2 tablespoons dried crumbled Mexican oregano
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Freshly ground black pepper
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1 cup seeded chopped cucumber (from 1/2 English or hothouse cucumber)
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1 cup seeded chopped tomatoes (from 2 tomatoes)
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1/2 cup capers, drained
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1/4 cup chopped fresh cilantro
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4 radishes, finely chopped
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12 corn tortillas
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2 avocados, halved, pitted, peeled and sliced, for serving