Instructions: Melt butter and add flour and cook. Stir slowly until well blended without lumps. Make sure flour is cooked. Add stock, mix well then add yolks and stir.

Add chicken, ham, mushrooms and pimentos, stirring to mix all ingredients.

Fold in spaghetti. Place in casserole dish, sprinkle with grated cheeses. Bake until cheese is melted golden brown.

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