Preheat oven to 350 degrees. Grease a 9 x 13-inch baking pan; set aside.Combine shortening, brown sugar, and egg; beat until light and fluffy. Combine the flour, baking soda and salt together; add to the egg mixture alternately with the buttermilk, ending with flour. Fold in the rhubarb and mix in well.
An Amish farm that has a market stall sells these and calls them Rhubarb Dream Bars. My mom calls them Rhubarb Bars. So take your pick of names!
“The recipe is from the Kalona, IA Historical Village Cookbook published in 1971, so it is almost an antique recipe. The contributor, Marilyn Svoboda, calls it Rhubarb Delight. An Amish farm that has a market stall sells these and calls them Rhubarb Dream Bars. My mom calls them Rhubarb Bars. So take your pick of names!”
Fold in the rhubarb and mix in well. Pour mixture into the prepared pan and bake at 350 degrees for 30 to 40 minutes until a wooden toothpick inserted in the center comes out clean. Cool before cutting.