Kathy's Spinach Egg Bake

2 pkgs. frozen spinach

5 T. butter

2 eggs, beaten

1 c. grated cheddar cheese

1 medium onion, chopped

1 T. flour

2 c. milk

1 c. seasoned bread crumbs

Prepare spinach as directed on pkg. Drain. Saute onions and butter in saucepan until clear. Stir in flour. Combine eggs and milk. Add to flour moxture. Stir constantly until smooth and thickened. Fold bread crumbs and cheese into cooked spinach. Combine spinach with thickened milk sauce. Place in buttered casserole dish. Bake at 350 for 30 minutes. Sprinkle top with grated cheese. Return to oven for 5 minutes or until cheese is melted.