If you're dying for a creamy sauce, though, a healthy alternative is pureed cauliflower. It really does have a very thick, creamy consistency, and with a few spices makes a great sauce for chicken or pasta. Or you can just puree it with some cottage cheese, fresh basil and pepper and eat it with a spoon. YUM!
Oh, this sounds terrific! I'm going to try this. It will satisfy my need for creamy sauces (lulz), and also allow me to consume more veggies, albeit in puréed form.