1lemonzested and juiced (about 3 tablespoons of juice)
1teaspoonred chili flakes
1/2cupgrated Parmesan cheese
Fresh chopped Italian parsley
Rinse, devein and remove the tails from the shrimp and add them to a medium size bowl. Drizzle with 1 tablespoon of olive oil and add 2 cloves of the minced or pressed garlic. Season with kosher salt and freshly ground black pepper, toss with the olive oil and garlic and set aside.
Trim the ends of the zucchini and use a spiralizer to create noodles of zucchini. If you don't have a spiralizer, slice into thin coins, cut into matchsticks, or use a vegetable peeler to create long ribbons, then set aside.
Bring a large pot of water to a boil then add a healthy amount of kosher salt to flavor the water. Cook the linguine according to package directions, minus 2 minutes so it is still al dente. Use tongs to transfer the cooked linguine to a strainer and reserve the pasta water, brining it to a slow bubbling simmer.
In a large, high-sided pan or skillet, add 1 tablespoon of olive oil to the pan over medium-high heat. Place the shrimp in the pan and cook for 2 minutes, then turn the shrimp to the other side and cook for 2 more minutes or just until opaque. Transfer the shrimp to a plate. In the same pan, melt the butter over medium-high heat and add the remaining 1/3 cup olive oil. Scrape up the garlic bits and add the remaining 2 minced or pressed garlic cloves, the lemon zest, lemon juice, red chili flakes and 1/2 cup reserved pasta water. Cook for 1 minute stirring once or twice.
Dunk the zucchini noodles into the pan you cooked the pasta in with the reserved pasta water and cook for 1 minute, stirring, just long enough to take away the rawness. Use tongs to transfer the zucchini noodles to the skillet with the olive oil mixture and toss to coat. Stir in the linguine noodles and 1/4 cup of the Parmesan cheese and toss to coat. Add more of the reserved pasta water 1/4 cup at a time to loosen the pasta and make more of a sauce if desired. Place the shrimp in with the pasta and zucchini and season with more kosher salt and freshly ground black pepper to taste. Top with the remaining 1/4 cup Parmesan cheese and garnish with chopped Italian parsley and serve.