Step 1

Purée almonds, oil, ½ tsp. salt, and ½ cup water in a high-powered blender on high speed until thick and smooth, about 3 minutes. Transfer almond purée to a medium bowl.

Step 2

Using a fork, smash trout into smaller pieces and mix with scallion whites, lemon zest, 1 tsp. lemon juice, and a big pinch of pepper. Taste and adjust salt and lemon juice accordingly. Transfer to a serving bowl, then top with scallion greens and more pepper.

Step 3

Do Ahead: Dip can be made 2 day ahead. Cover and chill.