Created by lazyme on March 30, 2020
Step 1: Cook onions in butter, just until tender.
Step 2: Blend in flour, salt, and pepper.
Step 3: Add bouillon and sherry.
Step 4: Cook and stir until thickened and bubbly.
Step 5: Turn into 1 quart casserole.
Step 6: Toss croutons with 2 tablespoons melted butter and spoon on the onion mixture, evenly.
Step 7: Sprinkle with Swiss cheese and Parmesan if desired.
Step 8: Put in oven under broiler and broil for about 1 minute until the cheese melts.
Step 9: Serve immediately.