Add tomatoes and garlic; cook 2 minutes longer. Vegan Chicken Alfredo. The vegan version is just as delicious as the traditional one (maybe even more!) This vegan Alfredo sauce is incredibly delicious and versatile too. Bring a large pot of water to a boil, and salt generously. Bring to a boil. Perfect for a busy week day and there nothing you will miss flavor wise. Combine the flour, salt, pepper and cream; stir into chicken mixture. A lot of quick recipes lack flavor, but this recipe is everything and a bag of chips! How to Make Vegan Fettuccine Alfredo. Cook fettuccine according package directions. Add the pasta and cook according to package directions until al dente (tender but still slightly firm). This vegan chicken alfredo pasta is a very easy a quick recipe.Just like pasta dish that inspired this. Cook and stir for 1-2 minutes or until thickened. Meanwhile, in a large skillet, saute chicken and peas in butter until chicken is no longer pink. but it is much more nutritious as it has veggies and nuts sneaked into it. The traditional fettuccine Alfredo is packed with fats while lacking in nutrients.