I tell whoever is cooking not to worry about it. I will eat what I can, and avoid the stuff I can't have. I also stick closely to the diet plan for the rest of the meals that day so that I don't have to worry about getting too much of something we're not supposed to have.
How do you handle dinner invitations on dialysis? On a few occasions I tried to explain to the hosts all the dietary restrictions I had, but I could see that I was just filling them with anxiety about getting the meal properly prepared, especially since they could not show off any of their good recipes, nor did they know how to cook without salt. Finally, I found I was getting fewer and fewer invitations, since people could not cope with the stress. With my closest friends, however, the solution we adopted was that I would sit down to dinner with all the other guests and just eat nothing at all. This was a little awkward at first and made some guests uncomfortable, but as the conversation got going, people seemed to forget about how odd it looked for one person to have no plate or glass in front of him.
Would it be possible to perhaps bring your own food?