Quite a while back, there was a local restaurant that served green beans that I absolutely loved. These were not standard "string" green beans such as you might find canned or frozen, but these had full pods with beans inside that were speckled. The flavor was beany and nutty and creamy all at once. They were satisfying and delicious.
I've never found a bean like that since, though I have been poring over the seed catalogs trying to find it.
Something called the "greasy" (smooth podded) pole bean looks sort of like it. At any rate, I might try it this year. Variety is Pine Mountain Greasy and the seed source was Sustainable Mountain Agriculture Center Inc. (
https://www.heirlooms.org/).