Step 1

Bring about 1 inch of water to a boil in a large saucepan fitted with a steamer basket. Add potatoes, cover and steam until just tender, 4 to 5 minutes. Spread on a plate or clean cutting board in a single layer until cool.

Step 2

Arrange salmon, the potatoes, onion, cucumber, radishes, tomatoes, eggs, roe, capers and lemon wedges on a platter (or platters). Sprinkle with chopped dill and pepper. Garnish with fresh dill sprigs, if desired.