Place the cucumber, chickpeas, cherry tomatoes, green beans, tuna, onion, olives, feta and parsley in large bowl. Drizzle over the olive oil and squeeze over the lemon juice. Season well and toss together.
1 lebanese cucumber, 400 g canned chickpeas, 1 cup cherry tomatoes, 1 cup green beans, 185 g canned tuna, 0.5 red onion, 0.5 cup kalamata olives, 60 g feta cheese, 0.5 cup parsley leaves, 2 tbsp extra virgin olive oil, 1 lemon