Salmon Platter with Caper Dressing

Preparation

1. Step 1

   Peel potatoes and cut into 1/4-inch-thick slices, then transfer to a 2-quart saucepan and cover with water by 1 inch. Add 1/2 teaspoon salt and bring to a boil. Reduce heat and simmer, partially covered, until potatoes are tender, 5 to 8 minutes. Drain, then transfer to a bowl.

   Step 2

   Meanwhile, whisk together lemon juice, chopped capers, mustard, sugar, and remaining 3/4 teaspoon salt until sugar and salt are dissolved, then whisk in oil until emulsified.

   Step 3

   Toss potatoes gently with 1/4 cup dressing. Toss onion with 1/4 cup dressing in another bowl and let stand 5 minutes.

   Step 4

   Peel and pit avocado, then cut into 1/4-inch-thick slices.

   Step 5

   Arrange potatoes, avocado, cucumber, onion, salmon, and bread on a large platter and sprinkle with whole capers. Drizzle with some dressing and serve remainder on the side.