Heat canola oil in a 2 1/2 or 3 qt saucepan, over medium heat. Add the onions, bell pepper, and garlic. Cook until just translucent. Add the broth and bring to a boil. Whisk in the peanut butter and cumin. Blend well. Season with salt and pepper as needed. Add peas and bring to a boil. Stir in couscous and return to a boil, stirring constantly. Remove from heat. Cover and let sit about 5 minutes or until the liquid is absorbed. Fluff with a fork and serve.