Bring a large pot of salted water to a boil. Add 8 oz of your preferred pasta and cook according to package instructions until al dente. Reserve about ½ cup of the pasta water before draining, then drain the pasta and set aside.
Heat 2 tablespoons of olive oil in a large skillet over medium heat. Add minced garlic and sauté for about 30 seconds until fragrant.
Add the peeled and deveined shrimp, season with salt, pepper, and 1 teaspoon of Italian seasoning, and cook for 2-3 minutes on each side until shrimp turn pink and opaque.
Remove the shrimp from the skillet and set aside. In the same skillet, add the sliced zucchini and sauté for 3-4 minutes until just tender but still crisp. Season lightly with salt and pepper.
Lower the heat and stir in 2 cups of marinara sauce into the skillet with zucchini. Let it simmer for 2 minutes.
Return the shrimp to the skillet, then add the cooked pasta. Toss everything gently to combine. If the sauce seems thick, add a splash of the reserved pasta water to loosen it up.
Remove the skillet from heat and stir in 1 cup of grated Parmesan cheese, allowing it to melt into the sauce, creating a creamy texture.
Garnish with fresh basil leaves before serving.