INGREDIENTS
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1 tablespoon vegetable oil
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2 lbs beef flank steak
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1 cup beef broth
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1 (8 ounce) tomato sauce
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1 small onion, sliced
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1 green bell pepper, seeded and sliced into strips
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2 garlic cloves, chopped
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1 (6 ounce) tomato paste
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1 teaspoon ground cumin
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1 teaspoon chopped fresh cilantro
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1 tablespoon olive oil
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1 tablespoon white vinegar