Croque Madame - cooking recipe

Ingredients

4 tbsp butter or margarine
1 tbsp flour
1/3 cup vegetable stock
1/3 cup milk
8 slices white bread
4 slices Emmenthal cheese (or substitute Gruyere or Swiss)
4 slices cooked ham
4 None eggs

Preparation

Melt 1 tbsp of butter in a saucepan, stir in the flour and cook briefly. Pour in the stock and milk, stirring constantly. Bring to a boil and simmer for 3-5 mins. Season to taste.
Put 1 slice of ham and 1 slice cheese on each of 4 slices of bread. Put the other slices of bread on top. Heat 2 tbsp of butter in batches in a pan and sear each sandwich for 5 mins, turning as necessary.
In a second pan heat 1 tbsp of butter and fry the eggs. Arrange the toasted sandwiches on plates with some sauce and an egg on each.