Bring stock and milk to the boil

Add salt and pepper

Add butter and stir until melted

Add polenta

While polenta is cooking melt butter in a pan and add olive oil

Add spinach and allow to wilt

Bring water and vinegar to boil

Stir to form a current/swirl

Drop eggs in one at a time and allow to set

Add parmesan cheese and butter to cooked polenta and allow to melt by stirring well

Dish polenta in a bowl, add spinach and egg