Chicken Satay with Spicy Peanut Sauce

Name: Chicken Satay with Spicy Peanut Sauce
Ingredients: 2 tablespoons fish sauce; 1/4 cup fresh lime juice; 2 stalks fresh lemongrass, thinly sliced (optional); 2 tablespoons agave nectar; 1 tablespoon low-sodium soy sauce; 1 tablespoon minced fresh ginger; 1/2 teaspoon chili flakes; 4 garlic cloves, minced; 1 pound boneless, skinless chicken breasts or thighs; 2 tablespoons vegetable oil, plus more for grilling; 1/4 small Napa cabbage, shredded (about 3 cups); 6 ounces snap peas, shredded; 1/4 cup cilantro leaves; Spicy Peanut Sauce for serving, recipe follows; 3 tablespoons reduced-fat smooth peanut butter; 1/4 cup light coconut milk; 2 teaspoons fish sauce; 1 to 2 teaspoons chili-garlic sauce; 1 tablespoon fresh lime juice; 1 tablespoon agave nectar