Slice onions. Know any tricks not to cry while cutting onions? I whistle which works pretty well, but you need a lot of onions for this recipe. Check out the comments on the original post for some great tear saving tips!
Melt butter in a saute pan over medium heat, and add onions. Saute onions until clear, a little brown is ok. In a shallow 2 qt. casserole pan, layer onions, 2/3 of cheese and pepper to taste.

In a sauce pan, heat soup, milk, and soy sauce, stirring to blend. Pour soup mixture in a casserole and stir gently to mix. Top with bread slices. Bake at 350 uncovered for 15 minutes. After 15 minutes, top of bread should be nice and toasted.

Push bread slices under the sauce and top with the remaining cheese. Bake for 15 more minutes and you are done!