Advance preparation: Cook onions in butter until tender. Blend in flour and pepper. Add bouillon and liquid; cook and stir until thickened and bubbly. Turn into 1-quart casserole, cover and chill. Toss croutons with melted butter. Before serving, bake casserole, covered, at 350° 30 minutes. Sprinkle with croutons and cheese. Bake uncovered, 5 to 10 minutes more.
From the Farm and Dairy
Made in USA Cookbook, 2002