I make potatoes a variety of ways. My favorite is mashed potatoes. I mash them with a hand mixer and I add about 1/2 tablespoon of olive oil. If the potatoes need a little moisture I add a small amount of water. I like gravy too and some times I make gravy from the chicken drippings. However, I remove all of the fat first. The thing I like is to finely slice some Golden Yukon potatoes and lightly fry them in a small amount of olive oil. After they are browned on both sides a bit I cover them and let the steam finish the cooking. Boiled peeled potatoes with a bit of olive oil is nice too.
Contary to what Heather has published on the web site mushrooms are high in IF. They give me problems. Similarly avocado gives me D, not sure why, but I don't eat them. It could be the fat content.
Good luck with the diet
-------------------- STABLE: ♂, IBS-D 50+ years - Science of IBS