Heat oil. Chop onion into quarters and then slice, crush garlic and add to hot pan and cook until soft. Add sliced chicken, cook thoroughly then add oregano and spices. Cook for further 2 mins. Add ¼ cup stock, tomatoes and their juice, salt and sugar and cook for approximately 10 mins.
Assemble burritos in order of: chicken mix, lettuce, carrot, cheese and sour cream.
Wrap and enjoy.