In a large serving bowl, add 2 cans of drained and rinsed cannellini beans, 1 medium english cucumber, 1 chopped red bell pepper, 1 pint grape tomatoes cut in half, 1 cup crumbled feta cheese, ½ cup sliced red onion, ⅓ cup sliced kalamata olives, and ¼ cup chopped fresh parsley. Gently toss everything together.
In a separate medium bowl, mix together 3 tablespoon lemon juice, 2 tablespoon olive oil, 1 teaspoon salt, ½ teaspoon ground black pepper, ½ teaspoon dried oregano.
Pour the salad dressing mixture overtop of the bowl and gently toss everything together again. Cover the bowl with plastic wrap and place in the fridge to chill for 1 hour. Stir again just before serving.