Place the tomatoes, olive oil, chili, salt and sugar in a saucepan and let it simmer over a medium high heat. Stir regularly to prevent it sticking and simmer until reduced and thickened. Taste and adjust the seasoning/sweetness if needed.
While the tomatoes simmer prepare the avo and chicken.
Scoop out the avocado flesh and mash roughly with the lemon juice. Mix in the parsley and season to taste.
Place the chicken breasts between two sheets of plastic wrap and pound with a rolling pin to about 1/2 cm in thickness. Season the breasts with your choice of seasoning, heat a small amount of oil in a pan and fry the breasts until cooked and slice into thin strips.
To assemble: Heat the wraps in the microwave for about 10 seconds. Top each wrap with the rocket, chicken, tomato relish, mashed avo and onions. Roll up and serve.