Add the tomatoes, cucumber, feta, olives, and red onion to a large mixing bowl.
In a small bowl or measuring cup, whisk together the olive oil, parsley, red wine vinegar, garlic, Dijon mustard, honey, salt, and pepper until well combined.
Pour the dressing over the salad and gently toss until everything is evenly coated.
Let the salad rest for 10–15 minutes before serving to allow the flavors to come together.
Serve chilled or at room temperature.
Notes
Scoop out the cucumber seeds for the best texture.
Let the salad sit for about 10-15 minutes before serving so the vegetables soak up all that dressing.
If making ahead, wait to add the feta and dressing until just before serving.
Taste before serving, you may only need a small pinch of salt since feta and olives are naturally salty.