INGREDIENTS
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4 (6- to 8-oz.) skinned and boned chicken breasts
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2 tsp. kosher salt
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1 tsp. freshly ground black pepper
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2 Tbsp. butter
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1 pt. grape tomatoes, halved
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3 Tbsp. sweet orange marmalade
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2 tsp. red wine vinegar
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1/3 cup loosely packed fresh basil leaves, chopped