Mussels and Cod Bucatini With Spicy Tomato Sauce

Name: Mussels and Cod Bucatini With Spicy Tomato Sauce
Ingredients: Salt; 3 tablespoons extra-virgin olive oil; 2 shallots, minced; 10 garlic cloves, thinly sliced; Black pepper; Crushed red pepper; 1½ cups dry white wine; 2 pounds mussels, cleaned (see Tip); 1 (28-ounce) can tomato purée; 1 tablespoon Calabrian chile paste, plus more to taste; 3 pounds cod fillet, cut into 1-inch cubes; 2 pounds bucatini or other long pasta; 4 tablespoons salted butter; 1 cup chopped parsley, plus more for garnish; 1 lemon