Step 1: Prepare the Chicken - If you haven't already, cook your chicken. You can use either poached, grilled, or store-bought rotisserie chicken. Once cooked, shred the chicken into bite-sized pieces.
Step 2: Combine the Salad Ingredients - In a large mixing bowl, combine the shredded chicken, halved grapes, chopped celery, Greek yogurt, and Dijon mustard. Season with salt and pepper to taste. Mix everything together until well combined.
Step 3: Prepare the Tortillas - Lay out your tortillas on a clean surface or plate. If desired, warm them slightly in a microwave to make them more pliable, which will help with wrapping.
Step 4: Assemble the Wrap - Place a couple of lettuce leaves on each tortilla. Spoon a generous amount of the chicken salad mixture onto the lettuce.
Step 5: Wrap It Up - Fold in the sides of the tortilla and then roll it tightly from the bottom to the top. Make sure the filling is secure inside the wrap.
Step 6: Slice and Serve - Slice the wrap in half diagonally and serve immediately. You can also wrap it in sandwich paper for an on-the-go meal!