Rinse and drain the beans thoroughly so the salad stays fresh-tasting. Wash and chop the cucumbers, tomatoes, bell pepper, onion, parsley, and olives. Crumble the feta fresh if you haven’t already.
Place the beans into a large mixing bowl and add the cucumbers, tomatoes, onion, bell pepper, olives, parsley, oregano, and feta. This creates the colorful, hearty base of the salad.
Drizzle olive oil and red wine vinegar over the mixture. Season lightly with salt and pepper. Gently toss the salad until everything is well coated and combined.
You can serve the salad right away, but it tastes even better when chilled for 20–30 minutes. This allows the flavors to blend beautifully.