Preheat oven to 350° F , and prepare a 9 x 9-inch pan with oil or spray. In a large bowl, cut oil into pancake mix until crumbly. In a small bowl, mix egg, milk, maple syrup, and flax seed. Add wet ingredients to dry, and stir just until combined. Pour batter into prepared pan. Scatter top evenly with blueberries. Bake 20-22 minutes or until lightly browned on edges and top. Let cool slightly, cut, and serve warm with syrup and blueberries, or toppings of your choice. Cover leftovers tightly and store in refrigerator for up to 2-3 days.