I probably should get back to the cooking. At first, we tried to make cooking easier by getting Thermomix machine (its so expensive!) and I couldn't really use it because it was too much work to wash it. I find Instapot a lot easier to take care off.
I relied on local food coop salad bar where they precut vegetables and I could eat some of their premade soups.
I found things like hotdogs, dehydrated mashed potatoes (no dairy or soy), chicken broth, berries, very helpful and easy to eat. Once my MCAS got a little better I started eating cured meats (meat sticks, sardines, etc).
Salmon roe (caviar) is my go-to food during really bad days.
I used to do keto, Whole 30, vegetable juicing and lots of other great things and I felt like crap still most of the time (even though some symptoms were indeed relieved by the diet but they were not treating the most disabling issues). I eat what I can access easily and drink coffee past year / year and a half, not all organic, and sometimes I even eat sugary things and gluten foods and yet my functionality is much, much better.