Preheat oven to 200c or 400f (gas mark 6)
Add the potato, parsnip, carrot and spring onion to a bowl
season with a little salt and black pepper
Add in the egg and mix well to combine
Spread out on a tray lined with parchment paper
Spray over the top with spray oil
Place in the oven and bake for approx 30 mins, hash should be nice and golden.
Serve with your choice of sides.