You can make Carrabbas Mussels in White Wine Sauce at home.
BUTTER SAUCE: 2 tablespoons clarified butter (you'll need about 1/2 stick butter; directions follow) 2 tablespoons finely chopped yellow onion 2 tablespoons finely chopped garlic 6 tablespoons fresh lemon juice 2 tablespoons dry white wine Kosher salt White pepper 2 tablespoons cold butter To clarify butter: Melt 1/2 stick butter over low heat. When melted, remove from heat and set aside for several minutes to allow the milk solids to settle to the bottom. Skim the clear (clarified) butter from the top and discard sediment. (This can be done ahead.) To make sauce: Heat clarified butter, add onion and garlic and saute until transparent. Add lemon juice and white wine and season to taste with salt and pepper.