Shrimp Pesto Alfredo is a decadent, low-carb, dinner option perfect for when you are wanting a special dinner. You don't have to be following a low-carb eating plan to love this dish. Shrimp Pesto Alfredo Shrimp Pesto Alfredo is low carb as long as you swap out the pasta for a low carb option. Your favorite spiralized vegetables will make a smart choice. For those of you who love traditional Alfredo dishes, serve the Shrimp Pesto Alfredo over your favorite pasta.