Off-Tasting Onions Illness - McDonald's, Sleaford England

Lincoln Road, Sleaford, NG34 8NP England, United Kingdom

Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps
Suspected source: Quarter pounder meal
Onset: Less than 4 hours
Duration: 4 to 12 hours
Sick: 2 people
Additional information: The onions tasted off and had a weird texture | Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps