Cook spinach according to package directions. Drain and reserve liquor.
Melt butter in saucepan. Add flour, stirring until smooth and blended. Add onion and cook until soft, but not brown. Combine milk and vegetable liquor until you have one cup of liquid. Add liquid slowly to onion/flour mixture, stirring constantly to avoid lumps. Add seasoning and cheese. Stir until melted. Combine with cooked spinach. Place in casserole dish and top with buttered bread crumbs.
Yield: six servings