Reintroduction quantities

[MariaChiara]

In the reintroduction plan are the authors suggesting that you have whatever you are introducing at each meal? (For example with legumes: peanut butter at breakfast, miso at lunch and black beans for dinner) That’s how the examples read to me and I am wondering if that is to make sure you get enough to see if it bothers you? What if I want to reintroduce oatmeal, can I just have that for breakfast and see what happens over the next two days? Will that be a true test or do I have to do non-gluten grains at each meal?

Thanks in advance for your help.