INGREDIENTS
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4 boneless, skinless chicken breasts, (about 1 pound), trimmed of fat
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1 teaspoon kosher salt, divided
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1/4 cup plus 1 tablespoon all-purpose flour, divided
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3 teaspoons extra-virgin olive oil, divided
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2 large shallots, finely chopped
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1/2 cup dry white wine
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1 14-ounce can reduced-sodium chicken broth
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1/3 cup reduced-fat sour cream
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1 tablespoon Dijon mustard
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1/2 cup chopped chives, (about 1 bunch)