Preheat the oven to 180ºc. Lightly oil a medium slice tray and line with baking paper.
In a mixing bowl, combine the oats, flax meal, chia seeds, baking powder, salt, whole eggs, egg whites, milk, yogurt, maple syrup, and vanilla. Stir well. Set aside for 10 minutes to allow the liquid to absorb into the dry ingredients.
After 10 minutes, add the protein powder and stir until well combined.
Pour the batter into the prepared baking dish. Bake for 34-38 minutes. After 20 minutes of baking, cover loosely with foil so the edges don’t get too dark.
Remove from the oven once the center of the baked oatmeal is slightly firm to touch or a toothpick inserted into the center comes out clean.Overhead view protein baked oatmeal in white baking dish.
Remove the baked oatmeal when the center is firm to the touch or a toothpick inserted into the center comes out clean.
Allow to cool for 10-15 minutes before cutting into 9 squares.
Serve with desired toppings of choice.Protein baked oatmeal servings on white plates, topped with Greek yogurt, pomegranate seeds, pistachios, and fresh berries.
Store leftovers in an airtight container in the refrigerator for up to 5 days or in the freezer for up to 3 months.