My sister makes this every spring, and the meat is so tender you can cut it with a spoon using only 4 ingredients.

tender you can cut it with the side of a spoon.
Serve the sliced pork straight from the white casserole dish, generously spooning the savory onion gravy over each portion.
Variations & Tips
If you prefer, you can swap the cream of mushroom soup for cream of chicken or cream of celery for a slightly different flavor while still keeping it to four ingredients. For a deeper onion flavor, use one and a half packets of onion soup mix on the meat and reserve the rest to stir into the