Amur Salad (Амурский Салат, salad with smoked salmon and tomato)

• 100 g (3.5 oz) sliced smoked salmon
• 1/2 chopped onion
• 1 chopped tomato
• Black pepper
• 1 tbsp vinegar
• Chopped dill

Amur means Amur River, which lays between Far East of Russia and China.
Just mix all and put in a refrigerator for a while.