Peel the cucumber.

Cut the cucumber in half lengthwise, then into six pieces. Dice into small cubes and place in a large bowl.

Peel the red onion.

Thinly slice the onion and add it to the bowl.

Rinse and dry the parsley.

Chop the parsley and mix it with the cucumber and onion.

Add three-quarters of the parsley to the bowl and mix.

Wash the tomatoes and remove the stems.

Slice the tomatoes into thick rounds and set aside the end pieces.

Remove the seeds from the end pieces and cut the tomato rounds in half.

Stuff the end pieces with the remaining parsley and arrange the tomatoes on a large serving platter.

Drain the feta and crumble it.

Add the feta to the bowl, then pour in the olive oil and vinegar.

Season with salt and white pepper, then mix well.

Spoon the contents of the bowl into the center of the platter and add the stuffed end pieces.

It's ready to serve!