I did an advanced search using the term hash in just the recipe forum and got 230 results. I did the results as posts and I started to read the first couple of results and just initially it looks like you can cook with hash. Do the search too and read the results and how they cooked with it so I don't give you second hand info. I would say that you should adjust for the strength of the hash and I don't think bringing pot snacks is such a good idea on an international flight. It might be easier from England to Canada so I don't want to say yes or no but do some research first.