Created by Mikekey on November 3, 2013
Step 1: Preheat oven to 400°. Butter or grease a 9-inch cake or pie pan.
Step 2: In a mixing bowl, combine oatmeal, flour, brown and white sugar, and baking soda. Cut in the butter (as you would for pie crust); with a pastry blender or with your hands, rub the butter into the dry ingredients until well blended.
Step 3: Beat in one egg and vanilla extract.
Step 4: Press 2/3 of the cake dough into the bottom of the pan. Spread the rhubarb jam evenly over the layer, then crumble remaining dough over top of cake.
Step 5: Bake for 20-25 minutes, or until crust is golden brown.
Step 6: Cool in pan on wire rack.
Step 7: Slice and serve.