Place the grains, mango, almonds, baby spinach, chili peppers in a bowl. Using a jar with a lid, make the salad dressing by combining the fish sauce, lime juice and sugar. Shake until the sugar has dissolved and pour over the salad ingredients in the bowl. Toss gently to combine. Taste and add salt and pepper as necessary.
Serves 2-3 as a main dish salad and 4-6 as a side dish.