1. Heat oil in a large nonstick skillet or wok over medium heat. Add pistachios. When nuts become fragrant and start to darken, stir in green beans. Cook, stirring, until the beans turn bright green, about 5 minutes. 2. Pour in chicken broth. Season to taste with salt and pepper. Cover and cook until beans are tender-crisp, about 10 minutes. Uncover and cook until liquid evaporates.