Step 1

Peel onions, and drop into boiling water. Cook until tender. Drain, reserving liquid. Set onions aside while you make the sauce.

Step 2

Melt butter or margarine in a saucepan over medium heat. Whisk in flour to make a paste. Mix together cooking water and milk. Add milk mixture slowly to the saucepan, stirring constantly, and cook until thickened. Add salt and pepper to taste. Add onions, and transfer to a serving dish.