Food Safety Report: Wally's coffee & toasties, Wally's Walk, Macquarie Park NSW, Australia 10 months ago • details Comments Comment Suspected food poisoning. Symptoms: Nausea, Vomiting Suspected source: Halloumi Onset: 4 to 12 hours Duration: 4 to 12 hours Additional information: Vomiting 6 hours after consuming halloumi and veg sandwich