INGREDIENTS
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1 medium onion, sliced
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4 boneless skinless chicken breasts
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1/2 teaspoon kosher salt
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1/4 teaspoon pepper
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1/2 lb fresh mushrooms, sliced
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2 medium zucchini, sliced
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2 garlic cloves, minced
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1 (14 1/2 ounce) can diced tomatoes, drained
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3/4 teaspoon dried basil
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1/2 teaspoon dried oregano
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1/4 cup parmesan cheese (optional)