Gather all ingredients on a clean workspace.
Lay a tortilla flat on a plate or clean surface.
Spread a tablespoon of ranch dressing evenly over the tortilla.
Place shredded lettuce in the center of the tortilla.
Add the cooked chicken on top of the lettuce.
Layer diced tomatoes and grated carrots over the chicken.
Add cucumber slices for crunch.
Season with salt and pepper to taste.
Fold the sides of the tortilla inward.
Roll the tortilla from the bottom up to enclose the filling.