Casbah Couscous Chicken

True confessions - I got this recipe from the side of the Casbah couscous box. But it really is quite good, and Julie (I think?) wanted the recipe. I think each time I've made it I've only made half, and there's enough for leftovers.

Sautee in 3 tbsp. butter or olive oil:
1 1/2 lb. chicken, diced
1 c. onion, chopped
1 c. carrot, chopped
1 c. mushrooms, halved
1 c. celery, chopped
1/2 c. walnuts, chopped
1 tsp. salt
2 tbsp. curry powder
1/4 tsp. cayenne pepper

Then add:
1 1/2 cup cooked garbanzo beans
1 1/2 cup tomato sauce
1/2 cup raisins (I like golden raisins)
1/2 c. wine

Cover and bring to a boil. Simmer for 40 minutes. Serve over prepared couscous as package directs.