Place 4 oregano sprigs, 4 cilantro sprigs and 1 halved jalapeno on a sheet of foil; top with 1 pound cleaned mussels. Scatter 4 tablespoons cut-up butter and 3 sliced garlic cloves over the mussels and drizzle with the juice of 2 limes (add the squeezed limes to the pack as well). Fold up the foil, leaving room for the mussels to open. Grill over high heat until the mussels open, 4 to 5 minutes.
Photograph by Kang Kim