01 - Preheat your oven to 350°F. Lightly grease an 8x8-inch baking dish.
02 - In a large mixing bowl, whisk together Greek yogurt, eggs, almond milk, maple syrup, lemon juice, lemon zest, and vanilla extract until smooth.
03 - Add the oats, protein powder, baking powder, and salt. Stir until just combined.
04 - Gently fold in the blueberries.
05 - Pour the mixture into the prepared baking dish and smooth the top. If desired, sprinkle sliced almonds and chia seeds over the top.
06 - Bake for 35 minutes, or until the center is set and the top is golden.
07 - Let cool for 5-10 minutes before slicing. Serve warm or at room temperature.