Add the chopped lettuce, cucumber, cherry tomatoes, red bell pepper, kalamata olives, green olives, and red onion to a very large bowl. Toss well to combine.
Sprinkle in the crumbled feta cheese and toss again. Set aside.
Add all of the dressing ingredients to a mason jar, salad dressing cruet, or small bowl. Whisk or shake well to combine.
Pour over the salad, then using a pair of tongs to toss everything together until lightly coated in the dressing.
Serve immediately, or refrigerate for later.
Notes
Storage: Salad is good for 2-3 days in the refrigerator, but it is best when eaten within the first 24 hours. If you’re making the salad ahead of time, wait until just before serving to add the dressing. Seeding the cucumbers and cherry tomatoes will also reduce liquid and extend storage, so if you have the time to remove the seeds I highly recommend it. Dressing: The Greek vinaigrette is made with olive oil, which solidifies in the refrigerator. If making the dressing ahead of time just remember to let it “melt” or soften at room temperature for 15-20 minutes (or run the jar under hot tap water). Then shake, pour, and serve.