Mussels a la plancha

MUSSELS A LA PLANCHA 

Plancha is simply another word for comal, or griddle.
* available at Mexican markets and some specialty produce markets

2 lbs small mussels (preferably cultivated), scrubbed well and beards pulled off
2 sticks (1 cup) unsalted butter
1/4 cup Veracruz salsa (recipe found in Dips Catagory)
1 tblspn fresh lime juice
1/4 tspn coarse salt, or to taste

Prepare grill.
Preheat a large griddle or 12-inch cast-iron skillet on a rack over very hot coals.
When griddle or skillet is very hot, add mussels and cook, stirring occasionally if using skillet,
until mussels are opened, about 3 minutes.
Discard any unopened mussels.
While mussels are cooking, in a small saucepan heat butter and salsa over moderately high heat
until mixture sizzles.
Remove pan from heat and stir in lime juice and salt.
Drizzle sauce over mussels.