Repeatedly off tuna without smell would be kind of hard to replicate.
My bet is on the sauce (like they kept reflling the same contaminated container)
Repeatedly getting sick from a work surface or employee hygiene seems sketch. up to 50% of the times and i’d be on board, but every time…







Yes, you can reduce it much faster assuming one food doesn’t contaminate random other foods and it’s not a workplace hygiene thing.
You could also ask for a bowl, dressing on the side, take it home, try the tuna, 12h try the dressing, 12h try the veggies.