Many low carb recipes for sauces and dressings on the web...check the recipe forum here. http://forum.lowcarber.org/forumdisplay.php?f=124
Also recommend the recipes in Kristie's Cookbook and YouTube. She uses "surkin" as the sweetener, which I have yet to buy. I have Swerve, and so rarely use it, a bag lasts me a long time.
http://forum.lowcarber.org/showthread.php?t=470795
https://m.youtube.com/watch?v=hBE0Tsle6KA