Cut the tomatoes into thin slices, and cut the onions in half rings.
Transfer vegetables to a salad bowl, add salt and pepper to taste, pour vinegar and oil. Mix well.
Tomato salad is very simple and quick to prepare and tastes very good. This salad is perfect for meat dishes, mashed potatoes and other side dishes. Wine vinegar adds piquancy to the salad, I also recommend to definitely add a little pepper and preferably not only black, but also red.