crabmeat au gratin

Ingredients For crabmeat au gratin

• 1 c

  finely chopped onion
• 1/2 c

  finely chopped celery
• 1/2 c

  butter
• 1/2 c

  all purpose flour
• 1 can

  13 ozs. evaporated milk
• 2

  egg yolks
• 1 tsp

  salt
• 1/2 tsp

  red pepper
• 1/4 tsp

  black pepper
• 1 lb

  lump crab meat
• 1/2 lb

  mild cheddar cheese
• 6 oz

  jar sliced mushrooms (optional)