Preheat the oven to 375 degree Fahrenheit. Grease a 9" inch square baking dish.
In a mixing bowl, add eggs, coconut oil, almond milk, maple syrup or honey, vanilla extract, salt and cinnamon. Whisk to combine. Add oats, desiccated coconut (if you're using) and baking powder and mix it in.
Reserve some frozen berries to sprinkle on top or use fresh blueberries. Scatter a cup of frozen blueberries on the bottom of the baking dish and add the rest to the batter. Pour the battter into the baking dish.
Garnish with reserved blueberries and chopped walnuts. Sprinkle some brown sugar on top for added sweetness, crunch and shine.
Bake for 45 to 50 minutes, until the top is nice and golden. Let it cool before slicing.
Serve with whipped Greek yogurt and more blueberries.