Rough chop the parsley, dill, shallot, cornichons and capers so that they will blend evenly in the food processor. Place in the bottom of the food processor along with mayonnaise, ketchup, dijon, tabasco, lemon juice with zest and Worcestershire sauce.
Pulse just long enough to combine. If you dont have a food processor just chop the ingridents fine to the consistancy you prefer then whisk together all the ingredients.
Notes
Serving Size 2 tbsp.If using dry parsley and dill use tsp instead of tablespoonBlend as smooth or as chunky as you like. some people prefer a smooth sauce while others prefer chunky like a tartar sauce.