Make the dressing. In a bowl, whisk Greek yogurt, Parmesan, olive oil, Dijon, anchovy paste, garlic, lemon juice, and Worcestershire. Season with salt and pepper.
If it’s too thick, whisk in a teaspoon of water at a time until it’s creamy and spreadable.
Taste and adjust. Add more lemon for brightness, more Parmesan for richness, or an extra pinch of salt if the flavors need a lift. The dressing should be punchy, not bland.
Prep the chicken. Chop or shred the cooked chicken into bite-size pieces. Toss with 2–3 tablespoons of dressing to lightly coat and keep it moist.
Prep the lettuce. Wash, dry, and chop the romaine.
Dry leaves are key so the wrap doesn’t get soggy. Toss the romaine with a few spoonfuls of dressing until lightly coated.
Warm the tortillas. Heat each tortilla in a dry skillet for 15–20 seconds per side or microwave covered with a damp paper towel for 10–15 seconds. Warm tortillas are easier to fold and less likely to tear.
Assemble the wraps. Lay a tortilla flat.
Add a quarter of the dressed romaine in a line down the center. Top with a quarter of the dressed chicken, a few tomato halves, a sprinkle of Parmesan, and a few crushed croutons if using.
Wrap it up tight. Fold the sides over slightly, then roll from the bottom up, tucking as you go. If you like, sear the seam side in a hot skillet for 30 seconds to help seal and add a little toasty flavor.
Serve or pack. Slice in half on the bias.
Eat right away, or wrap tightly in foil or parchment for later. Keep extra dressing on the side if packing for lunch.