
Rhubarb bars with a shortbread crust and tangy rhubarb custard filling are a fun, easy spring dessert.
Preheat oven to 350°F. In a medium bowl, combine the flour and powdered sugar. Using a pastry blender cut in butter until the mixture resembles coarse crumbs. Pat the crumbs into a well greased 9 x 13 in baking pan. Bake the crust at for 10-12 minutes or until lightly browned.
While the crust is in the oven, mix together eggs, sugar, flour, and salt. Gently stir in the diced rhubarb. Pour the rhubarb mixture over the hot crust.
Return bars to the hot oven. Reduce oven temperature to 325° F and bake for 30-35 min or until the filling is set and no longer jiggly.
Cool for 30 mins on the counter. Refrigerate and chill completely before cutting into bars.