My response does not appear to be typical. But I did start with a VERY limited diet and almost opposite of my normal “healthy” Mediterranean diet (fruits, veggies, legumes, whole grains, olive oil, chicken and fish).

Initially, NO gluten, dairy eggs or soy, low fiber, low fat, no raw veggies and no fruit. I also quit eating chicken, but not turkey.
That left beef or pork, green beans, white rice, mushrooms, GF matzos, etc. I did so well that I started adding one food at a time, similarly to the way the Low fodmap diet does, after the first week.

I eat five to six small meals or snacks/day, which keeps me from being hungry. I now also eat blueberries and honeydew, canned greens,
eggs, and some Imagine boxed soups which are great for mixing with greens, rice and mushrooms — and/or ground beef. But I recommend very small portions of each.

Let me know if I can be of further help.