Food Safety Report: Black beans, Moe's Southwest Grill, West Jefferson Boulevard, Fort Wayne, IN, USA 2 years ago • details 12 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Cramps, Headache Suspected source: Black beans Onset: 4 to 12 hours Duration: 12 to 24 hours Sick: Me Additional information: Moes