"These bars have all the sweet-tart flavors of rhubarb pie with a simple buttery crust, but without the fussiness of rolling out pie dough. And you can still serve them topped with ice cream. Game plan: The bars can be made through step 2 up to a day ahead of time. This recipe was featured as part of our Mother’s Day Picnic menu, as well as our menu celebrating 100 days of the Obama White House and our Picnic Recipes photo gallery...."