• 1 hothouse cucumber - unpeeled, seeded, and sliced 1/4-inch thick
• 1 red bell pepper - large-diced
• 1 yellow bell pepper - large-diced
• 1 pint cherry or grape tomatoes - halved
• 1/2 red onion - sliced in half-rounds
• 1/2 pound feta cheese - 1/2-inch diced (not crumbled)
• 1/2 cup calamata olives - pitted

Vinaigrette

• 2 cloves garlic - minced
• 1 teaspoon dried oregano
• 1/2 teaspoon Dijon mustard
• 1/4 cup good red wine vinegar
• 1 teaspoon kosher salt
• 1/2 teaspoon freshly ground black pepper
• 1/2 cup good olive oil