Combine the olive oil, lime, cumin, salt and pepper in a bowl and stir to combine. Add the chicken and marinate for 30-45 minutes at room temperature. Heat a grill to high heat. Lift the chicken from the marinade and grill, turning often, until no longer pink in the centre, 10 to 15 minutes. Let the chicken cool, then slice into strips. Combine the chicken, avocado, tomatoes, onion basil and sesame seeds. Serve as a salad or in a wrap.