Salads with avocado

1 cup shelled pistachio nuts 4 tablespoons olive oil 4 skinless, boneless chicken breast halves garlic powder to taste black pepper to taste 1 (10 ounce)[...]

6 ounces couscous 1 1/4 cups vegetable broth or 1 1/4 cups chicken broth , hot 1 (13 ounce) jar roasted red peppers, drained 1 ripe avocado 6 scallions 1/2[...]

1/2 head romaine lettuce , chopped (about 2 1/2 cups) 1 (15 ounce) can black beans , rinsed and drained 3/4 cup tomato , seeded and chopped 3/4 cup jicama ,[...]