In a mixing bowl, combine the oat flour, baking powder, baking soda, protein powder, and stevia. Whisk the dry ingredients together until they are well-mixed.
In a separate bowl, combine the Greek yogurt and egg whites. Stir until smooth. Gradually add this mixture to the dry ingredients, mixing until just combined. Be careful not to overmix; you want your pancakes to stay fluffy!
Heat your non-stick skillet or griddle over medium heat. Lightly grease it with a small amount of oil or cooking spray to prevent sticking.
Pour about 1/4 cup of batter onto the skillet for each pancake. Cook until bubbles form on the surface and the edges look set, about 2-3 minutes. Flip and cook for another 2-3 minutes until golden brown. Repeat with the remaining batter.
In a small saucepan, combine the diced pineapple, blueberries, lemon juice, and water. Cook over medium heat for about 5-7 minutes, stirring occasionally, until the fruits soften and release their juices. Use a fork to mash the mixture slightly for a thicker syrup consistency.
Stack your pancakes on a plate and drizzle the warm Pineapple-Blueberry Syrup over them. Enjoy your delicious Greek Yogurt Pancakes with a refreshing tropical twist!