Instructions

  1. Preheat oven to 350 degrees.
  2. Saute onion in butter.
  3. Beat egg yolks until thick and lemon-colored.
  4. Stir into hot white sauce along with spinach and cheese.
  5. Fold in egg whites beaten until stiff, not dry, peaks are formed; turn into greased 1 1/2 qt casserole.
  6. Set in pan of hot water and bake about 50 minutes.
  7. White Sauce: Melt butter, stir in flour and heat until bubbly.
  8. Gradually add milk or cream, stirring constantly; cook 1-2 minutes.
  9. Season with salt and pepper.
  10. Makes about 1 cup.
  11. Serve immediately.