1 small onion, chopped.
60g (2 oz) butter.
170g (6 oz) mature cheddar cheese.
145g (5 oz) porridge oats.
1 egg-beaten (optional).
Quarter teaspoon dried mustard.
One finely chopped spring onion (scallion).
Salt & pepper.
Fry onion gently in butter until soft. Add all other ingredients and mix well, Smooth ingredients into greased 8 inch circular baking tin. Bake at 180°C (360°F) for 25 minutes or until golden brown. Cut into wedges and serve warm or cold.