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

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.