Hi @chienrouge ,
Ah I see. Definitely agree about finding restaurants where the kitchen is willing to accommodate adjustments to dishes (no matter the reason). Beyond allergies, I do also see the chef-side where they might’ve had a taste / recipe that they spent a long time developing and wanted to serve you their recipe as is.
Re: Sweetbreads - Hm, I’ll keep an eye out for alternate preps. Like you said, Sweetbreads are not common in So Cal (I don’t see it that often). I’d imagine if you ever did a private dinner with Chef Laurent (Bistro LQ), you could absolutely request certain dishes and note things you want to avoid. Chef Laurent was super nice and accommodating when we arranged a Christmas dinner there last time (a buyout), so we got to influence the menu / make requests. 
