I'm a nanny of 13+ years and worked on this with my currently family of 5 years. I joined when the eldest was 1yr (now 6) and he had a egg and nut allergy. We worked on the egg ladder with him and now he's allergy free! It does take a little while and A LOT of patience!!
Do one food item a week starting by rubbing it on lips, then 1/4 of the food item. Following day offer 1/4 again, then if no reaction offer 1/2 the next day and so on! This is how we did it but please be aware that there's lots of other ways ☺️ Feel free to message me if you have any questions
Following because same!!