Parmesan Onion Bake
["6 medium onions, sliced", "1 c diced celery", "8 T butter or margarine, divided", "1/4 c flour", "1 t salt", "1/8 t black pepper", "1 1/2 c milk", "1/3 grated Parmesan cheese", "1/2 c chopped pecans"]
["Saute onions and celery until tender in a large skillet in 3 T butter; drain and set aside.", "In a saucepan, melt the remaining butter; stir in flour, salt and pepper until smooth.", "Gradually stir in milk and bring to a boil.", "Cook for 2 minutes until thickened, stirring constantly.", "Pour over vegetables and toss to coat."]
["onions", "celery", "T", "flour", "salt", "black pepper", "milk", "Parmesan cheese", "pecans"]