Put the blackberry porridge, oat flakes, baking powder, cinnamon, pinch of salt and berries in a baking dish.
Then mix the egg, maple syrup and vegetable drink in a bowl and mix well.
Then add the wet ingredients to the dry ingredients. Finally, fold in the berries and chopped walnuts.
Then place the casserole dish in your oven at 190 degrees C for 30-35 minutes until a hard crust forms on your porridge.
Take the baked porridge out after the baking time and you can enjoy it.