1 ½tbsparrowroot flour, tapioca, or other thickener
1/2tspcinnamon
Instructions
Preheat oven to 350ºF. To make topping; in a bowl combine oats, sweetener, ground flax seeds, flour, nuts, and cinnamon; mix well. Work in butter with a fork or fingertips until evenly distributed and all the dry ingredients are moistened.
To make filling; in a 6 cup (1.5 L) baking dish, toss together rhubarb, blueberries, sweetener, thickener, and cinnamon. Sprinkle topping evenly over fruit. Bake for 35 to 40 minutes or until fruit is soft and topping is golden brown.