I had cauliflower and onions that I needed to use up this week and just in time was this recipe from Rachel Ray. I have to say that this turned out really well. I think next time I will make my own crust for the quiche, but over all this was pretty yummy. I think it would also taste good if you added other vegetables to the quiche. Really whatever you had on hand would work.
Cauliflower, Sweet Onion and Leek Quiche Recipe - Every Day with Rachael Ray