Filling: In a large heavy sauce pan combine berries, add sugar and water. Bring to a boil over medium heat, boil for 20 minutes or until thickened, stirring frequently. Stir in zest and orange juice. Let cool.

Crumb mixture: In a large bowl combine flour salt and baking soda. Stir in oats and brown sugar. With fork or fingertips, blend in butter until well mixed and crumbly. Put 5 cups into a greased 9X13" pan, press evenly over bottom of pan. Bake at 350 F for 12 minutes. Let cool. In a small bowl lightly beat egg and water. Add 2 Tbsp. of egg mixture to remaining crumb mixture and mix until clumps form. Spred filling evenly over baked crumb mixture to within 1/4" of sides. Sprinkle with remaining crumb mixture breaking up any large clumps. Press down lightly. Bake at 350 F 35 to 40 minutes or until lightly browned. Cool then cut into bars.