M.O.
These aren't recipes per se, but my life has been saved by Daiya non-dairy cheese. You can make just about any vegetarian recipe that calls for cheese with it. I also make baked goods with soy butter. And I try to get my son to have a "green smoothie" with mango and spinach every morning, for the calcium. Just about any Indian cookbook will have recipes so delicious you'll never want to eat meat again. The Moosewood Kitchen cookbooks are also full of wonderful, easy, kid-friendly recipes.
Good luck!