Review of LongHorn Steakhouse

Be careful eating here! Went after the dinner rush on a Tuesday evening, not too busy. Advised server of gluten allergy/sensitivity and she said no problem and got me the gf/allergy menu. Ordered the sirloin and grilled shrimp, plain sweet potato and a cup of the shrimp and lobster chowder, all are listed as gluten free. She even wrote gluten allergy on the order pad. Everything tasted great, steak cooked perfectly but on my drive back to the hotel only 12 minutes away I started to feel sick to my stomach and itchy welts appearing.