I have seen many examples of peer assessment with DT, but recently I visited a partner school and found this useful document and I sought permission to share it. I have adapted it to be used with KS3, but originally it was for KS4 peer assessment.
If you find it useful please leave a comment/rating and let me know how you get on.
Food Technology Peer Assessment NEW GCSE (KS4)
Food Technology Peer Assessment NEW (KS3)
I have used it to great effect with Y9’s & 10’s predominantly.