This is another recipe I used to use up all that excess frozen hamburger I suddenly had (don't ask). Needless to say, the guys got tired of hamburger recipes. I definitely modified as the original called for MSG - yuck. And 3/4 teaspoon salt! Not healthy now a days.
In a large skillet, cook hamburger and onion till meat is lightly browned and onion is tender. Stir in corn, soups, sour cream, pimiento, and seasonings. Mix well.
Stir in cooked macaroni. Turn into 2 1/2 quart casserole. Mix bread cubes and 4 tablespoons melted butter; sprinkle atop. Bake at 350 for 45 minutes or till hot and bread crumbs are brown but not burned.