Good idea to add Dijon mustard. Did you feel the almond milk made it too runny? We never have almond milk on hand so I think I'll use a combo of whipping cream with either sour cream or Greek yogurt.
I would have liked it to thicken just a bit more, and I am blaming the almond milk, although I may not have drained the cauliflower as well as I could have I just keep on winging it with all of these recipes. Some are hits, but plenty are misses!