In a large pot, bring salted water to a boil. Add spaghetti and cook according to package instructions until al dente. Drain and set aside.

In a skillet, heat 2 tablespoons of olive oil over medium heat. Add minced garlic and saut? for about 1 minute until fragrant.

Add the shrimp to the skillet, season with salt, pepper, and red pepper flakes. Cook for 2-3 minutes on each side until shrimp are pink and opaque.

Stir in lemon zest and lemon juice. Cook for an additional minute.

Add the cooked pasta to the skillet with the shrimp and toss to combine. Drizzle with remaining olive oil and sprinkle with fresh parsley before serving.