Yakuta, if you go to this link Be-Ro - Recipe Inspiration
then look under 'all recipes' then ' cheese straws' you will find the recipe I used. The only exception is I add cayenne pepper as well as mustard and when I cut the strips I twist them before putting on baking sheet. I sometimes add a sprinkle of herbs or parsley for some extra colour. I used mature cheddar.
Could you post your recipe too? or PM it to me?