Bring a large pot of water to a rolling boil and generously season it with salt. Add the linguine or spaghetti and cook according to the package instructions, typically until al dente (about 8-10 minutes). Once cooked, drain the pasta and set aside, ensuring to reserve 1/2 cup of the pasta water for later use.
In a spacious skillet heated over medium heat, combine 2 tablespoons of butter and 2 tablespoons of olive oil. Once the butter has melted, add in the minced garlic and red pepper flakes. Sauté for 1-2 minutes until the garlic is fragrant and lightly golden, carefully watching that it doesn’t burn.
Introduce the peeled and deveined shrimp to the skillet. Season them generously with salt and freshly cracked black pepper. Allow the shrimp to cook for 2-3 minutes on one side until they turn a lovely pink hue, then flip them over and cook for an additional 2-3 minutes until they are fully cooked through and opaque.
Carefully pour the chicken broth and the freshly squeezed lemon juice into the skillet, using a wooden spoon to scrape up any delicious bits stuck to the bottom of the pan. Bring the mixture to a gentle simmer and let it cook for approximately 2-3 minutes, allowing the flavors to meld.
Lower the heat and add the remaining 2 tablespoons of butter, along with the drained pasta, lemon zest, and reserved pasta water. Toss everything together with a pair of tongs until the pasta is evenly coated in the luscious sauce and warmed through.
Take the skillet off the heat and garnish the dish with the freshly chopped parsley and grated Parmesan cheese, if desired. Taste and adjust seasoning as necessary, adding more salt, pepper, or red pepper flakes according to your preference.
Notes
Serve in a large, shallow pasta bowl and garnish with extra parsley and lemon wedges for an appealing presentation.