Preheat the oven

• Preheat the oven to fan 180 °C.

Mix the base

• In the baking dish, mash the banana.
• Add the oats, protein powder, baking powder and milk.
• Stir until completely combined and clean down the sides.

Swirl the toppings

• Alternate dollops of the warmed raspberries and yogurt over the top.
• Swirl them together with a chopstick to create a marble effect.

Bake

• Bake until the oats are set in the centre.

Cool and slice

• Let the dish cool before slicing so the squares keep their shape.

Serve and store

• Reheat a portion in the microwave, or enjoy it cold as an oat bar.
• Serve with extra yogurt and a little nut butter.
• Store the remaining portions in an airtight container in the fridge.