In a large ovenproof skillet, combine shrimp, butter, garlic, red pepper flakes and lemon juice. Season with salt and pepper to taste.
Once the water starts boiling, add the pasta and cook according to package directions.
Place the skillet in the oven and bake until the butter is melted and the shrimp is opaque, about 9-11 minutes. Remove skillet from the oven.
Reserve one cup of pasta water and set aside. Drain the pasta.
Add the pasta to the skillet and toss until the noodles and completely coated with the butter. Add the pasta water a little at a time to thin out the sauce if needed.
Garnish with chopped fresh parsley and shredded Parmesan cheese, if desired.