Cut tomatoes and boiled eggs into large slices. Put everything on a platter, add salt to each layer.
Put the olives on top. Preparing the filling. Mix sour cream, mayonnaise, mustard, lemon juice, sugar, ground black pepper in a cup with a spoon. Add the dressing to taste.
Spread the dressing on the salad! Sprinkle with finely chopped green onions and serve.t