Marinade. Good idea, too. I'll have to save a little and pull a chicken breast out of the freezer. These suggestions will pretty much kill a batch, which is just what I want.
And Bill, the dip for boiled shrimp was an excellent call.
Your sauce recipe looks somewhat like a zippy tartar sauce. If tomatoes were in season around here I'd try it as an alternative to my mayo and horseradish on a burger with tomato and some sliced onion on a toasted bun.