Cut the grape tomatoes in half and place them in a large bowl.

Small-dice the red onions and add them to the bowl with the tomatoes.

In a small bowl, whisk together the white wine vinegar, olive oil, kosher salt, and fresh ground black pepper to create the vinaigrette.

Pour the vinaigrette over the tomatoes and onions and toss well to combine.

Chop the fresh basil and parsley leaves.

Add the chopped basil and parsley to the salad and toss again.

Dice the feta cheese into 1/2 to 3/4-inch cubes.

Gently fold the feta cheese into the salad, being careful not to crumble it too much.

Allow the salad to sit at room temperature for at least 5 minutes before serving to allow the flavors to meld.