01 - Bring a large pot of salted water to a boil. Cook the pasta according to package directions until al dente. Reserve ½ cup of pasta water before draining. Set the drained pasta aside.
02 - In a large skillet over medium heat, melt the butter. Add the minced garlic and sauté for 1 minute until fragrant and lightly golden.
03 - Stir in the Dijon mustard, smoked paprika, crushed red pepper flakes, Worcestershire sauce, lemon zest, and lemon juice. Cook for 1 to 2 minutes, stirring frequently to blend the flavors.
04 - Add the chopped parsley, chives, kosher salt, and black pepper. Stir well to combine all ingredients into a cohesive sauce.
05 - Transfer the cooked pasta into the skillet with the sauce. Toss vigorously, adding reserved pasta water a splash at a time until a glossy, creamy sauce evenly coats every strand.
06 - If using shredded chicken or grilled steak, fold it into the pasta now. Cook for an additional 2 minutes until the protein is warmed throughout.
07 - Serve immediately, garnished with extra fresh herbs, grated Parmesan cheese, and lemon wedges alongside.