Ingredients

• 3 Tbs. red wine vinegar
• 2 Tbs. extra-virgin olive oil
• 1 tsp. dried oregano
• Kosher salt and freshly ground black pepper
• 1-3/4 lb. cucumbers (3 medium or 10 small), peel, halved, seeded (if necessary), and thickly sliced
• 1/2 red onion, thinly sliced
• 1 scant Tbs. chopped fresh dill
• 1/4 cup crumbled feta