Preheat the oven to 400°F (200°C), 360°F (180°C fan), or preheat the air fryer to 360°F (180°C).1 tablespoon maple syrup
Grease a small baking dish with oil spray, butter or margarine, coating the base and sides.
Add rolled oats to the dish, then crack in the eggs and start mixing gently.
Add vanilla yoghurt, maple syrup, baking powder and vanilla extract to the oats and eggs.
Mix everything thoroughly in the dish until the oats are fully coated and the batter looks even.
Stir in the blueberries gently so they are distributed throughout the mixture.
Place the baking dish into the preheated oven or air fryer.
Bake for 20–25 minutes until the top is golden, puffed and the centre is set.
Remove from the heat and let the bake cool slightly.
Serve warm with extra yoghurt or custard, if desired.