Set a large 1-gallon stock pot of water to a boil and add the kosher salt. Place the pasta in the pot and stir the pot until the water returns to a boil. Cook the pasta until tender, but with a bit of resistance (al dente), about 12 minutes. (We like our pasta a little softer so we cook a few minutes longer).
While the pasta cooks, prepare the shrimp. Set a 12-inch saute pan over medium-high heat. Add 2 teaspoons of the garlic and butter to the pan. Once the butter has melted, season the shrimp with salt and pepper then add the shrimp to the pan. Sear the shrimp until pink, about 1 minute, then turn over and cook for another minute. Remove the shrimp from the pan and set aside.
After the pasta is cooked top with shrimp and fresh chimichurri sauce. Add Parmesan cheese and toss to blend. Serve immediately.