Thanks everyone. One quick note I learned quite by accident. The shrimp concoction is better the second day. The overnight rest in the frig allows the grilled flavor of the shrimp to come through better.
Whether you want it or not, here's the recipe.
3 lbs of peeled and deveined shrimp, coated with olive oil and your favorite Cajun seasoning mix, grilled and allowed to cool and then coarsely chopped.
Combine 1&1/4 cup mayo, 1/4 cup coarse grain mustard, 3/4 cup chopped celery, 2 tsps. dried dill, 2 tbsp. chopped green onion tops, 2 tbsp. fresh lemon juice and hot sauce to taste.
Stir in the cooled chopped shrimp and thoroughly combine.
There you have it.