1.Bring A Large Pot Of Lightly Salted Water To A Boil. Turn Off Heat And Stir In Cabbage And Carrots; Let Stand For 2 Minutes Then Drain In A Colander. Rinse Well With Cold Water, Then Squeeze Dry. 2.Place Shredded Cabbage And Carrots Into A Large Bowl Along With The Onion, Oregano, And Mayonnaise. Mix Together Until You Have A Mixture Resembling Coleslaw. This Is The Curtido. 3.To Prepare Sandwiches, Lightly Spread Each Roll With Mayonnaise And Pile With Shredded Turkey. Place A Scoop Of Curtido On Top Of The Turkey, And Finish With Sliced Tomatoes, Cucumbers, And Radishes.