Shrimp Pasta With Preserved Lemon

Name: Shrimp Pasta With Preserved Lemon
Ingredients: 1 lb. medium tube-shaped pasta (such as rigatoni or penne); Kosher salt; 1 lb. large shrimp, peeled, deveined; ¼ cup extra-virgin olive oil; 6 garlic cloves, finely chopped; ¼ cup finely chopped preserved lemon; ½ tsp. crushed red pepper flakes; 4 Tbsp. chilled unsalted butter, cut into 4 pieces; 2 oz. Parmesan, finely grated (about 1 cup), plus more for serving; 1 Tbsp. fresh lemon juice; ⅓ cup finely chopped parsley, plus more for serving