Mix oats, orange juice and zest. Blend in oil and eggs. Stir together flour, sugar, baking powder, salt and baking soda. Add oat mixture; mix lightly. Fold in blueberries. Spoon batter into 24 paper-lined muffin tins, filling two-thirds full. Combine topping ingredients; sprinkle over batter. , Bake at 400° for 15-18 minutes or until lightly browned., Cool for 5 minutes before removing to a wire rack.