1. Spread each tortilla with mayo and top it with lettuce. 2. On top of the lettuce add the shredded cooked chicken, tomato slices, and pieces of cucumber. 3. Sprinkle with dried oregano and roll the tortilla very tightly in a piece of aluminum foil and seal it so you can cut clean cuts later. 4. Keep in the fridge for up to 1 day and serve.