Black Bean and Couscous Salad

1 cup uncooked couscous
1 1/4 cups chicken broth
3 TBS olive oil
2 TBS lemon juice
1 tsp rice vinegar
1/2 tsp cumin
8 green onions, chopped
1 bell pepper, seeded and chopped
1/4 cup chopped fresh cilantro
1 cup corn kernels
2 cans black beans (or equivalent cooked dried beans)
salt and pepper to taste

Cook couscous in chicken broth. Add other ingredients. Toss, season to taste, and serve.