Crafting this dish is a delightful process that involves timing and layering flavors. Follow these steps carefully for a restaurant-quality meal right in your own kitchen.

Part 1: Cooking the Pasta and Broccoli

1. Boil the Water: Bring a large pot of water to a rolling boil. Don’t be shy with the salt—add at least 1 to 2 tablespoons. Salting the water is the only opportunity you have to season the pasta itself from the inside out, ensuring a flavorful final dish.
2. Cook the Pasta: Add your chosen pasta to the boiling water and cook according to the package directions, but aim for the lower end of the time range. We are looking for al dente, which means “to the tooth.” The pasta should still have a slight, firm bite to it, as it will continue to cook a little more when combined with the sauce later.
3. Blanch the Broccoli: About 3-4 minutes before the pasta is finished cooking, add the broccoli florets directly into the pot with the pasta. This is a brilliant time-saving trick! It cooks the broccoli perfectly until it’s tender-crisp and vibrant green, all while using just one pot.
4. Reserve and Drain: Before draining the pasta and broccoli, use a mug or heatproof measuring cup to reserve about 1 ½ cups of the starchy pasta water. This liquid gold is the key to creating a silky, emulsified sauce. Drain the pasta and broccoli in a colander and set aside.

Part 2: Creating the Zesty Lemon Garlic Sauce

1. Prepare the Shrimp: While the pasta is cooking, pat your peeled and deveined shrimp completely dry with paper towels. Season them generously on both sides with salt and black pepper. This step is crucial for getting a beautiful sear on the shrimp instead of just steaming them in the pan.
2. Sauté the Aromatics: In a large skillet or Dutch oven (large enough to hold all the pasta later), heat the ¼ cup of olive oil and 2 tablespoons of the butter over medium heat. Once the butter is melted and sizzling, add the sliced garlic and ½ teaspoon of red pepper flakes. Cook, stirring constantly, for about 60-90 seconds until the garlic is fragrant and just beginning to turn golden. Be very careful not to let the garlic brown or burn, as it will become bitter and ruin the sauce.
3. Cook the Shrimp: Add the seasoned shrimp to the skillet in a single layer. Cook for 1-2 minutes per side, just until they turn pink and opaque and curl into a “C” shape. An overcooked shrimp is tough and rubbery (shaped like an “O” for “Overcooked!”), so watch them closely. Once cooked, use a slotted spoon to remove the shrimp from the skillet and set them aside on a plate. This prevents them from overcooking while you finish the sauce.
4. Deglaze the Pan: Pour the ¼ cup of white wine (or broth) into the hot skillet. As it sizzles, use a wooden spoon to scrape up all the delicious browned bits (called fond) from the bottom of the pan. Let the wine simmer and reduce by about half, which should take 1-2 minutes. This step infuses the sauce with an incredible depth of flavor.
5. Build the Sauce: Reduce the heat to low. Stir in the juice and zest of one lemon, the remaining 2 tablespoons of butter, and the chopped fresh parsley. Whisk everything together until the butter has completely melted and the sauce is well combined.
6. Bring It All Together: Add the cooked pasta and broccoli to the skillet with the sauce. Pour in about ½ cup of the reserved pasta water to start. Using tongs, toss everything together vigorously. The starch from the pasta water will help the sauce cling to the pasta and broccoli, creating a creamy, emulsified coating rather than a watery pool at the bottom of the pan. Continue to toss for 1-2 minutes, adding more pasta water, a tablespoon at a time, until the sauce reaches your desired consistency.
7. Final Touches: Return the cooked shrimp to the skillet. Toss gently for another 30 seconds to heat the shrimp through and coat them in the sauce. Taste the pasta and adjust the seasoning. It may need another pinch of salt, a squeeze of lemon juice, or a dash of red pepper flakes to make the flavors pop. Serve immediately.