My only bean soup recipe, well, it calls for ham, which would make it both unsafe for IBS and not kosher, sorry.
But I do have a quick meal suggestion that I actually was going to post anyway.
Take a chicken/turkey/vegetarian hot dog, slice it into chunks, and fry it in a small (6- or 8-inch) skillet sprayed with nonstick spray until the hot dog is browned and crispy around the edges. Then pour into the skillet a small can of vegetarian baked beans. Stir well and eat once the mixture is hot, mashing the beans up as necessary for your particular tummy. (Personally, I find that canned baked beans are so mushy they're not a problem unless I overdo in terms of quantity.) Serve with French or sourdough bread. Serves 1-2. Good with an equally mushy green vegie on the side, if you can handle it.