Place macaroni in an 8-cup (2 L) baking dish.
Add salt and pour boiling water on top.
Microwave 6 to 8 minutes at HIGH.
Let stand 5 minutes, then drain.
Place all the ingredients except the buttered bread crumbs in the baking dish and stir until well mixed.
Add the macaroni.
Mix well, top with buttered crumbs and dot with butter.
Microwave, uncovered, 6 to 8 minutes at MEDIUM-HIGH.
Let stand 5 minutes, then serve.
Using different kinds of creamed soup in this casserole produces different flavors.
Helpful hint: Food well spaced in a shallow dish will reheat more quickly than in a narrow, deep dish.