Prepare couscous according to package directions, using chicken stock for liquid. Drain and set aside.
In a large frying pan combine the wine, oil, half the lime juice, 1 teaspoon cumin and garlic; mix all together and add chicken. Simmer over low heat until all liquid has evaporated and chicken juices run clear, 5 to 7 minutes.
Remove chicken from frying pan and mix in a large bowl with remaining lime juice, remaining 1/2 teaspoon cumin, green pepper, red pepper, yellow pepper, spring onion and couscous. Garnish with a few black olives per serving.