I am not sure if you had a child or not, but you don't give the baby food before 4 to 6 months. So its not that you aren't exposing them at all, but not feeding them the food.
There are powders to add to your formula / breast milk to introduce allergens early (we used Ready Set Food but easy to DIY). Kind of annoying since they often clog the nipple of the bottle, but we did it with my daughter who is now 20 months and her favorite breakfast is a spoon of peanut butter. Sesame gives her a slight reaction still, we unfortunately don’t eat it very often.
