"This is a great substitute for tartar sauce...."
INGREDIENTS
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3/4 cup mayonnaise
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2 teaspoons Dijon mustard
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1 1/2 teaspoons whole-grain mustard
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1 teaspoon tarragon vinegar
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1/4 teaspoon Tabasco sauce
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2 teaspoons drained tiny capers, chopped
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1 tablespoon chopped fresh flat-leaf parsley
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1 scallion (3 inches of green left on), very thinly sliced
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Salt and freshly ground black pepper, to taste