Although this satisfying sauce contains some very rich ingredients, its taste and simplicity make it a wonderful weeknight indulgence. Traditionally, Romans serve alfredo sauce over fettucine. You can also use farfalle (bow ties) or spinach fusilli (tight spirals) and have marvelous results. This dish is definitely substantial enough to stand on its own. When using it as a first course, serve it in very small quantities before serving a lean grilled or roasted type of beef, veal, chicken, lamb, or seafood. Once you’ve mastered this classic, try adding smoked salmon and cooked broccoli and serving it with farfalle.