I like the recipes I have tried from theppk.com and one of my friends loves the beet burger recipe on there. She says it tastes a lot like the veggie burger from The Cheesecake Factory. I have made the Island black bean burger from her "Isa Does It" cookbook and love it!

http://abc.go.com/shows/the-chew/recipes/fabulous-sweet-potato-burger-clinton-kelly