INGREDIENTS
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4 skinless chicken breast halves on the bone, about 2 pounds
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Salt and freshly ground black pepper
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2 teaspoons olive oil
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1 medium onion, thinly sliced
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1 red bell pepper, thinly sliced
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1/2 pound white mushrooms, thinly sliced
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2 garlic cloves, minced
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1/2 cup dry white wine
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1 (14 1/2-ounce) can whole tomatoes in juice, chopped and juice reserved
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1/2 teaspoon dried oregano
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1/8 teaspoon red pepper flakes or more to taste