Season the chicken thighs with salt and pepper and rub with olive oil. Heat a grill pan on medium-high heat and cook the chicken 3-4 mins each side until cooked through and browned. Set aside and allow to cool.
Combine all the salsa ingredients in a bowl. Once the chicken has cooled down, chop it into pieces.
Assemble the wraps by spreading the salsa over the lettuce leaves and topping with pieces of chicken.