Creating this exceptional Garlic Butter Shrimp and Sausage Skillet Pasta is straightforward. Follow these steps for a seamless cooking experience:

1. Cook the Pasta: Begin by cooking the spaghetti or linguine according to package instructions. Drain and set aside.
2. Cook the Sausage: In a large skillet, melt 2 tablespoons of butter over medium heat. Add the sliced sausage and cook until browned, about 5-7 minutes.
3. Add Garlic and Flavors: Stir in minced garlic and red pepper flakes (if using). Sauté for about 1 minute until fragrant.
4. Add the Shrimp: Toss in the shrimp, salt, and pepper. Cook for 3-4 minutes, stirring frequently until the shrimp turn pink and opaque.
5. Combine Tomatoes: Add the halved cherry tomatoes to the skillet, stirring well. Cook for an additional 2-3 minutes until the tomatoes begin to soften.
6. Incorporate the Pasta: Add the drained pasta to the skillet. Mix everything together until well combined.
7. Finish with Butter and Lemon: Stir in the remaining 2 tablespoons of butter and sprinkle with lemon juice for added brightness.
8. Garnish: Remove from heat and garnish with freshly chopped parsley and grated Parmesan cheese.
9. Serve: Plate the pasta and enjoy a wonderful meal filled with flavor!

These simple steps will guide you in creating an incredible one-pan meal that is sure to impress everyone at your table.