1 medium cucumber peeled, halved lengthwise, seeded, and cut into 1/2-inch dice (about 1 1/4 cups)
1 pint grape tomatoes quartered (about 1 1/2 cups)
3 tablespoons extra virgin olive oil
3 tablespoons red wine vinegar
1 medium garlic clove minced or pressed through garlic press (about 1 teaspoon)
1 can chickpeas drained and rinsed (14-ounce)
1/2 cup chopped pitted kalamata olives
1/2 small minced red onion (about 1/4 cup)
1/2 cup roughly chopped fresh parsley
1 romaine heart cut into 1/2-inch pieces (about 3 cups)
4 ounces feta cheese crumbled (about 1 cup)
Table salt
Ground black pepper
Combine cucumber, tomatoes, and 1 teaspoon salt in a colander set over a bowl and let stand 15 minutes.
Whisk oil, vinegar, and garlic together in large bowl.
Add drained cucumber and tomatoes, chickpeas, olives, onion, and parsley; toss and let stand at room temperature to blend flavors, 5 minutes.
Add romaine and feta; toss to combine. Season with salt and pepper and serve.