This is one of the most beautiful desserts I've made (as well as one of the most tasty). I went with pie crust because I couldn't find rectangular puff pastry, but I think it still turned out fabulous. I garnished with raspberries and orange zest (if you space out the raspberries right, it will help you cut a pie into more even slices). Thanks for sharing!
Since it is not the Rhubarb season yet I use Plum instead and it turned out great. I am going to make it again with Rhubarb when it is in season.