I just found a GREAT one. I read through it and I'm not kidding when I say I want to try every recipe in this book. Everything can be prepared in less than 30 minutes. I just love it!
Ditto on the Vegetarian Family Cookbook by Nava Atlas. Great recipes in there with vegan options for a lot of them.
I also love the recipes in Vegetarian Times magazine. They have a searchable recipe database on their website with hundreds of awesome recipes (so you don't have to buy the magazine to get good recipes). www.vegetariantimes.com