The verdict? The sauce was delicious when it was fresh, but upon baking it on the pizza, it became decidedly too vinegar-y. And it was not saucy enough for my taste, so maybe it could have been mixed some with a tomato sauce or some kind of vinaigrette? Also, there were way too many slices of leek on the pizza, and they were too thickly sliced. It was a bit overwhelming. However, this time the cheese melted beautifully and imparted some of that creamy texture that was missing in my first pizza.
Next time, I would definitely alter the sauce choice...I wonder if there is some kind of vegan white sauce. I mean, I guess it would be as simple as using Earth Balance butter and regular flour with unflavored soy milk and some seasoning. Hmm. I'll have to do some more research. Also, I think a very quick saute of the leeks would have made all the difference...one or two minutes at the most. And again, the crust was super-dense, but decidedly more crunchy this time which was delicious.
I think this was a good idea, it just suffered from some execution issues. I'll definitely be trying this a few more times in various forms.