Fettuccine with Mussels Chorizo and Lemon Butter

Name: Fettuccine with Mussels, Chorizo, and Lemon Butter
Ingredients: 6 tablespoons unsalted butter, at room temperature; 1 lemon, zested; 1/4 cup fresh flat-leaf parsley, chopped; Kosher salt; Freshly ground black pepper; 2 tablespoons olive oil; 1 large shallot, diced; 2 pounds mussels, beards trimmed and cleaned; 1/2 cup dry white wine; 2 fresh thyme sprigs; 1 pound fettuccine pasta; 6 ounces chorizo sausage, skinned and thinly sliced