Begin by preheating your oven to 350°F (175°C). Lightly grease a small oven-safe baking dish with a bit of cooking spray or softened butter.
In a blender, pulse your quick oats until they become a fine powder. Next, add all the other ingredients for the oats: baking powder, vanilla protein powder, lemon zest, fresh mixed berries, maple syrup, egg, almond milk, and vanilla extract. Blend until everything is just combined and the berries are slightly incorporated.
Pour this bright oat mixture into your prepared baking dish. Pop it into the preheated oven and bake for about 20-25 minutes, or until the top looks golden and set.
While your oats are baking, it's time to whip up the dreamy lemon glaze! In a small bowl, combine the plain Greek yogurt, softened cream cheese, powdered sugar, and a touch of lemon juice if you like extra zing. Whisk until smooth and creamy.
Once the baked oats are out of the oven, let them cool down for a quick 5-7 minutes. Then, generously drizzle your refreshing lemon glaze over the top. Serve warm and enjoy your delightful summer breakfast!