If your shrimp is frozen, add the shrimp to a large mixing bowl and fill with cold water. Let sit for a few minutes. Then, drain the water and add more cold water. Shrimp should defrost in just a few minutes. Prep shrimp and dry with a paper towel. Season the shrimp with salt and pepper.

Bring water to a boil in a large pot for the pasta. Follow instructions on the package.

Heat a cast iron skillet on medium high for 3 minutes. Add shrimp to skillet and cook for 1 to 2 minutes on each side, until cooked through and browned. Remove shrimp and place on a clean plate. Set aside.

Add olive oil and butter to the skillet on medium heat. When the butter melts, add the red pepper and cook for 2 to 3 minutes. Then add the garlic and cook for 1 to 2 minutes. Add the shrimp back in for 30 seconds and toss to coat.

Serve the shrimp with pasta topped with fresh parsley and parmesan cheese.