Preheat your oven to 350°F (175°C) and lightly grease an 8-inch square baking dish.
Combine the rolled oats, baking powder, ground cinnamon, and salt in a large bowl.
Mix the mashed banana, egg, maple syrup, vanilla extract, and milk until well combined.
Add the wet ingredients to the dry ingredients and mix until just incorporated.
Gently fold the Greek yogurt, ensuring it’s evenly distributed throughout the mixture.
Carefully stir in the mixed berries and chopped nuts.
Pour the oat mixture into the prepared baking dish and smooth the top with a spatula.
Bake for 25-30 minutes until the top is golden brown and a toothpick inserted into the center comes clean.
Allow the baked oats to cool slightly before serving. Add your choice of toppings and enjoy!
Prep: 10 minutes
Cook: 25-30 minutes
Total Time: 35-40 minutes
Cooking Time: 25-30 minutes
Total Time: 35-40 minutes
Kcal: Approximately 280 kcal per serving