That's one of the great things about pressure canning meats. Open a jar, slice or shred it and have an instant sandwich. or stuff to throw in/on a salad. or put some on a tortilla for a wrap. or microwave it a minute to have hot.
I also like cold Chunky Soup or cold canned baked beans. And would a can of tomato soup made with cold water be considered gazpacho? How about a can of sardines on crackers. Apple quarters dipped in peanut butter. A can of diced tomatoes is good cold - throw in some diced bell pepper, onion and cucumber.