<<Disclaimer: Verify this information before applying it to your situation.>>
I used to use Good Season Italian until I found this recipe
http://allrecipes.com/recipe/absolutely-fabulous-greekhouse-dressing/detail.aspx
I think it is better than Good Season Italian and it takes about the same
time to prepare. Plus, you get full control of all your ingredients, if
you are worried about allergens.
I hope this helps.
Visit the Celiac Web Page at Http://www.enabling.org/ia/celiac/index.html
Archives are at: Http://Listserv.icors.org/SCRIPTS/WA-ICORS.EXE?LIST=CELIAC