You might be reading this going "what the hell?" But I promise you this is a real thing and it's REALLY FUCKING GOOD.
The pickled mustard greens, beans, and tofu are all braised together and get this really complex but mellow flavor. There's an entire category of eastern European dishes that use braised sauerkraut in stews and this is really similar. Basically you get the tangy funk of the pickle, but it isn't overpowering and the other ingredients do a good job complimenting it or absorbing it.
The smoked tofu wasn't part of the original recipe but I had it in the fridge and it worked really well here! Y'all should absolutely try this out!