So when I craved pasta with Alfredo sauce I just took a half pound of bacon, trimmed the fat and pan fried it. After draining the pan I added some onions and finely chopped garlic. Thawed frozen peas were added and then fresh broccoli . Later, cheating, I added a jar of Alfredo sauce and a small container of another brand of Alfredo sauce with some milk. I added a dash of salt, some black pepper. You can add basil or mint or whatever flavor you like and bring to a slow simmer.
Add Penne pasta and enjoy.
Top with cheese as preferred.