Prep the chicken: If you’re using leftover or rotisserie chicken, shred or slice it into bite-size pieces. If you’re cooking from raw, quickly pan-cook a thin chicken breast in a little oil with salt and pepper, then slice once cooled slightly.
Make the high-protein Caesar sauce: In a small bowl, stir together the Greek yogurt, light Caesar dressing, lemon juice, and a pinch of salt and pepper. Add a teaspoon or two of water if it’s too thick; you want it creamy but spreadable.
Toss the filling: In a medium bowl, add the chopped romaine, chicken, and Parmesan. Spoon most of the Caesar-yogurt mixture over the top and toss until everything is lightly coated. Taste and adjust salt, pepper, or extra dressing if you like it saucier. Add garlic powder if you want a stronger Caesar flavor.
Warm the wrap: Place your tortilla in a dry skillet over low heat for 20–30 seconds per side, just until warm and flexible. This makes it easier to fold without cracking.
Assemble: Lay the warm tortilla flat. Spoon the chicken Caesar mixture down the center, leaving a bit of space at the top and bottom edges. Add optional tomatoes and crushed croutons on top if using.
Wrap it up: Fold the bottom edge up over the filling, then fold in the sides, and roll it tightly away from you to form a wrap. If you’re packing it to go, you can slice it in half and wrap it in foil.
Serve: Eat right away, or refrigerate for up to 4 hours if you don’t mind the lettuce softening a bit. For extra crunch later, keep croutons separate and add just before eating.