Prep the vegetables. Halve the tomatoes, slice the cucumber, onion, and bell pepper, and chop the parsley.
Pat the olives and feta dry with a paper towel to reduce extra moisture.
Make the dressing base. In a small bowl, whisk the Greek yogurt, olive oil, red wine vinegar, and Dijon until smooth and glossy.
Add flavor. Stir in dried oregano, garlic, honey (if using), salt, pepper, and lemon zest. Whisk well. Add cold water 1 tablespoon at a time until the dressing is pourable but still thick enough to cling.
Taste and adjust. Add a pinch more salt, vinegar, or oregano to suit your palate.
The dressing should be tangy, savory, and herb-forward.
Assemble the salad. In a large bowl, combine tomatoes, cucumber, onion, bell pepper, olives, and parsley. Add the feta on top.
Dress and toss. Spoon about two-thirds of the dressing over the salad. Toss gently to coat without crushing the vegetables.
Add more dressing as needed.
Rest briefly. Let the salad sit for 5–10 minutes so the flavors meld. This short rest helps the dressing soak in and taste more cohesive.
Serve. Finish with a drizzle of olive oil and a pinch of oregano or cracked pepper. Enjoy as is or pair with grilled chicken, shrimp, or warm pita.