Mince the celery, parsley and onions (both kinds) in your blender or food processor.
3 Tbsp Celery, Chopped, 3 Tbsp Green Onions, Chopped, 2 Tbsp Curly Parsley, Chopped, 1/4 C Yellow Onion, Chopped
Add the rest of the ingredients, except the shrimp, lettuce and oil, to the minced vegetables.
2 Tbsp Ketchup, 2 Tbsp Tomato Purée, 2 Tbsp Creole Mustard, 1 tsp Prepared Horseradish, 1 Tbsp Red Wine Vinegar, 2 tsp Paprika, 1/4 tsp Worcestershire Sauce
Begin blending/processing again. Slowly stream the oil into the mixture while it blends to form an emulsion.
2 Tbsp Vegetable Oil
Once all the oil is added, continue blending until the sauce is smooth (it shouldn't take much longer).
Cover the sauce and refrigerate for 8 hours, preferably overnight.
Before serving, taste the sauce for salt, pepper and horseradish.
Spread the lettuce evenly over four dishes.
2 Handfuls Iceberg Lettuce, Cut Into Ribbons
Toss the shrimp in the sauce to coat. Then divide evenly and place on top of the lettuce.
1 Lb Jumbo Shrimp, boiled, peeled, deveined and chilled
Enjoy right away, maybe with a lemon wedge or two.