Mornay Sauce - cooking recipe

Ingredients

2 c. milk
4 Tbsp. flour
4 Tbsp. butter
2 Tbsp. minced onion
1 bay leaf
3 Tbsp. grated Swiss cheese
3 Tbsp. Parmesan cheese
2 Tbsp. heavy cream

Preparation

Bring milk, onion and bay leaf to a full boil.
Let stand for 10 minutes.
Strain.
Over low heat, melt butter in saucepan; add flour and cook until light brown.
Gradually add milk and cream, stirring constantly, until mixture starts to boil.
Stir in salt and pepper to taste.