Shred the lettuce, then mound it in a salad bowl, forming a crater in the center.
Arrange the sliced tomatoes and cucumber along the sides of the mound.
Gently mix the chopped smoked fish, potatoes, and dill pickle; put this mixture into the crater.
Mix the mayonnaise, vinegar, and caviar, then spread over the salad.
Mix the chopped onions and olives, along with a little salt and pepper, and scatter over the salad.
Serve cold with bread. And vodka.