Quick and easy spinach with white sauce

250g box of frozen spinach
175 ml milk
3 tea spoons corn flour
Salt and pepper
Grated cheese

Place spinach in saucepan and bring to boil.
Cook until all liquid has evaporated.
Add milk - just enough to cover the spinach - and bring to boil stirring every now and then.
In the meantime, mix the corn flour, salt and pepper with a dash of water until dissolved.
When milk boils, add corn flour mixture while stirring.
Stir until mixture thickens.
Remove from heat and sprinkle with grated cheese.