There are tools called “Times and Plans” coming up in Week 4, available to you in a few days, on Sunday. These are helpful in the process of starting and stopping eating, whether meals or snacks such as dates with peanut butter.
Using these tools very much depends on what we cover in Week 3 – Desire – so that is coming first.
Even so, you might end up finding that it’s better to “make your choices in the shop” as far as peanut butter is concerned. That is very much your choice as these sorts of things are very different from person to person. I encourage you to try such changes on a trial basis, like, “I’ll leave the peanut butter in the shops for today and see how that goes.”