Add the chicken, spices, and seasonings — except the oil — to a bowl and combine.
Place a pan over medium-high heat, add the oil, and sear the chicken for 4–5 minutes, or until just cooked through. Work in batches if your pan isn't large enough, to avoid steaming the chicken. Remove and set aside.
Add the yogurt and garlic to a bowl and mix well. Season to taste.
To assemble, lay out one large wrap and spread with garlic yogurt. Layer over the lettuce, tomato, chicken, cheese, and chips (if using). Place a small wrap on top, then fold the large wrap around it to form a sealed pentagon shape. Sit it seam-side down to stop it unravelling.
In a dry pan over medium heat, toast the Crunchwrap seam-side down for 2 minutes, or until golden. Flip and repeat on the other side. Remove from the pan, slice in half, and serve.