Dont touch anything at sushi places one of the biggest problems at them is the rice.

Pasties, pies etc are all ok as long as hot (i have taken then to parents room before and heated further in microwave.

A sandwich bar with a quick turnover can stil be ok especially if you get the thinsg that are warm eg ****zels, tuna patties, roast etc.

If you want chinesse or anything like that buy things that you see them putting fresh into bai maree.

Noodle places cook fresh to order so they are ok.

Maccas make to order.

Good luck