I made cauliflower crust pizza! (recipe
here)
It was pretty good! Obviously can't really compare it to regular crust, but when you smother it in bbq sauce, you don't really taste the difference!
I made mine bbq chicken (which, of course, is not vegetarian) but you can easily change the toppings so that it will be vegetarian
I also made some delicious roasted potatoes
Recipe
here