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

and the water until mostly smooth. It doesn’t have to be perfect; a few small lumps will cook out.
Pour the soup mixture over and around the pork loin, making sure the meat is mostly nestled in the sauce. Use a spoon to spread some over the top so it’s well coated.
Cover the casserole dish tightly with heavy-duty aluminum foil, crimping the edges to seal in the steam. This is what helps the pork get tender enough to cut with a spoon.
Bake the covered pork loin at 300°