A Texas man has sued Whataburger seeking over $250,000 in damages after allegedly suffering a severe allergic reaction to onions in his fast-food meal. He claims he requested no onions but was served a meal containing them, which led to a medical emergency. Whataburger denies the allegations and has asked the court to dismiss the case, stating they were unaware of any issue with the food served. The lawsuit raises concerns about food allergy safety and accurate order handling at restaurants.