For the dressing: Stir together the water, fish sauce and sugar until the sugar dissolves.
For the salad: Combine the trout, dried shrimp, shallots, mango and mint in a salad bowl. Add 1/4 cup of the dressing and mix well. Garnish with the peanuts and chiles and drizzle with the garlic oil. Serve the remaining dressing on the side for drizzling.
Recipe courtesy of Luke Nguyen