Steps
1. Cook spaghetti according to package instructions until al dente. Drain and set aside.
2. In a skillet, melt margarine over medium heat.
3. Add minced garlic and sauté for 1 minute until fragrant.
4. Add shrimp, season with salt and pepper, and cook until pink and opaque, about 3-4 minutes.
5. Squeeze lemon juice over shrimp and stir.
6. Add cooked spaghetti to the skillet and toss to combine.
7. Sprinkle fresh parsley (and red pepper flakes if using) over the pasta and serve immediately.