Slice cucumber in half lengthwise and then crosswise cut into half-moons weak. Red onion cut in the same way. Rajčata překrájíme. Add the chopped parsley and mix everything. Pour over the vinegar and oil, salt, pepper and toss.
Let it cool for a while, before serving, stir well yet.
Recipe Notes
Red wine vinegar is more aromatic than white. If you hesitate, try to use only white vinegar, salad is also great.