Prepare Cream Sauce (Medium).
Cook 2 tablespoons minced onion in butter or margarine before stirring in flour.
Mix 2 tablespoons dry white wine or sherry, optional, 1 teaspoon lemon juice, 1/4 teaspoon grated lemon rind, and 2 beaten egg yolks.
Add to sauce slowly, stirring constantly.
Fold in 1 package (12 ounce) frozen crab meat, defrosted and flaked.
Mix gently; cover and heat.