Creamy Shrimp Rolls

From http://www.womansday.com/Recipes/Creamy-Shrimp-Rolls-Recipe.html

Recipe Ingredients

3 Tbsp mayonnaise
1 Tbsp whole-grain mustard
1/4 cup cornichons, chopped, plus 1 Tbsp brine Black pepper
1 lb cooked, peeled and deveined large shrimp, coarsely chopped
2 tsp chopped fresh tarragon
4 hot dog buns
4 pieces romaine or green-leaf lettuce
Potato chips, for serving
Recipe Preparation

In a large bowl, whisk together the mayonnaise, mustard, brine and 1/4 tsp pepper.
Add the shrimp, cornichons and tarragon and toss to combine.
Line the buns with the lettuce and top with the shrimp mixture. Serve with potato chips, if desired.