Had allergic congestion from sulfites in dried fruit before, now have rash after eating pasta made with dried vegetables--possible sulfites caused ?

See allergist or GI: Rash after eating a food can be a manifestation of food allergy. Skin testing or ige antibody test for suspected food allergen is way to test. Sulfites typically not a common cause of true allergic reaction but can cause non allergic reaction. Suggest you see an allergist or gastroenterologist. Take a picture of any rash you see after eating and keep detailed food diary also helpful for evaluation.