INGREDIENTS
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1/2 cup reduced-fat sour cream
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1/3 cup low-fat mayonnaise
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2 tablespoons minced fresh chives
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2 tablespoons prepared horseradish
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1 (2 1/2-pound) center-cut beef tenderloin, trimmed
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1/3 cup finely chopped shallots
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1/3 cup cognac
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1/3 cup water
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2 tablespoons minced fresh tarragon
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2 teaspoons chopped fresh thyme
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1/2 teaspoon freshly ground black pepper
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2 garlic cloves, minced
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1 teaspoon kosher salt
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Cooking spray
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30 (1 1/2-ounce) sandwich rolls, cut in half horizontally