i love doing this with any mild white fish, but haven't used oregano yet. i do mayo, parm, garlic- then any of the following: crushed red pepper, parsley and lemon juice when serving. sometimes, i do mayo, parm, garlic, dill, and then lemon juice and crushed red pepper when serving.

i particularly enjoy it with a roast green veggy like asparagus or roast broccoli with garlic, parmesan and lemon juice.