Wash the salad greens thoroughly.
In a large bowl, combine the mixed salad greens.
Add the halved cherry tomatoes to the bowl.
Toss in the diced cucumber.
Add the sliced red onion.
Introduce the black olives.
Crumble the feta cheese over the salad.
Drizzle olive oil and balsamic vinegar over the ingredients.
Season with salt and pepper.
Gently toss the salad to combine all ingredients.