<<Disclaimer: Verify this information before applying it to your situation.>> Here in Canada (at least Edmonton) McDonalds is serving McTwist Fries that are battered and spiced (not gluten free). They are on promotion for the month of February so do not order their Fries as they to are contaminated by the McTwist ones. When the promotion is over, check if they have changed the grease and cleaned the vats before ordering the regular fries.