I love shellfood, whether it be clams, oysters, or mussels.
Usually prefer to eat clams and oysters raw, but have never had, or seen, raw mussels on a menu and would not trust the stuff they sell in the grocery.
Great recipes are mussels maraniere, meuniere, and an all time favorite, mussels fra diavolo (yeah, the term implies hot but you can add as little,or as much, hot stuff as you wish. It is a tomato based sauce, and I love tomatoe sauce with mussels). There are manifold recipes for each of these on the web.
Have found the taste of mussels robust, as are the taste of most clams.
The stuff seems to tolerate a variety of spices and methods of cooking.
Have found one can easily substitiute mussels for clams in many recipes.
Just for a couple of other ideas, how about mussel fritters or chowda (just can't get the New England influence out of auntdot). Usually prefer a New England chowda but I think it would work Manhattan style, which I also love.
Too bad one of us is not a fan of shellfish or would be making more of this stuff at home.