In a large pot, bring salted water to a boil. Add the spaghetti or fettuccine and cook according to the package instructions until al dente. Drain and set aside.
In a mixing bowl, toss the shrimp with salt and pepper to season.
In a skillet over medium heat, heat the olive oil. Add the minced garlic and sauté for about 1 minute until fragrant. Then, add the shrimp and cook for 3-4 minutes, turning occasionally, until the shrimp are pink and fully cooked. Remove from heat.
In a separate bowl, combine the mayonnaise, sweet chili sauce, and sriracha. Mix well to make the Bang Bang sauce.
In the skillet (off the heat), add the cooked pasta to the shrimp. Pour the Bang Bang sauce over the mixture and toss gently until everything is evenly coated.
Plate the Bang Bang shrimp pasta and garnish with chopped green onions and sesame seeds. Serve immediately.
Feel free to adjust the spiciness of the sauce by increasing or decreasing the amount of sriracha.
For a healthier option, you can use whole grain or gluten-free pasta.