Not sure about Australia and esp. that area, but in my city and state there's not that many Asian grocers only due to the fact that they're smaller and tend to be family-run (not chain stores like Trader Joe's or Kroger's).
So if there's only two stores or even a few more, Erin shouldn't have trouble remembering where the mushrooms were purchased ?
The surviving man will be able to say what was served, etc.
I'm curious if EP sat with them during the meal, and if so, did they ask her why she was eating something different, or was it a usual occurrence -- i.e., some people pre-prepare their meals when losing weight or watching calorie/sugars/carb intake for a condition like diabetes ?
Omo.