INGREDIENTS
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1/3 cups balsamic vinegar
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2 boneless skinless chicken breasts (large)
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1 tablespoon extra-virgin olive oil
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1/2 teaspoons salt
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1/4 teaspoons freshly ground black pepper
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1 pint cherry tomatoes (halved)
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2 cloves garlic (peeled and minced)
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1 onions (medium, chopped)
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4 leaves basil (sliced)