Easy delicious and healthy! Traditional bircher uses apple juice but as I eat this a lot I use water to soak the oats in as I dont want to rot my teeth.
You can mix the oats, water, yoghurt and raspberries in a plastic container with a lid so the oats soak on your way to work. Then chop up the apple and squeeze on the lemon juice when you get to work. Makes 3-4 serves which I keep in the fridge and eat over successive days (although does not look quite as nice by day 4!)