Preheat the oven to 350°F. Spray a 9x5-inch loaf pan with oil.
Mash the banana in a large bowl. Stir the ground flax, milk, melted oil, maple syrup, and vanilla into the banana mixture until combined.
Stir the PurDate sugar, oats, baking soda, baking powder, salt, and flour into the wet mixture well.
Pour the mixture into the loaf pan. Press your desired toppings of nuts or chocolate chips into the top of your loaf.
Bake at 350F for 45 to 55 minutes until lightly golden on top. Bake time will vary depending on your oven so watch closely after 45 minutes.
Cool on a rack for at least 30 minutes. If you cut into the loaf too early it will crumble.