Drain and Rinse: Open the cans of chickpeas and kidney beans. Transfer them into a colander and rinse thoroughly under cold running water for 30 seconds to remove excess canning starches and sodium. Allow them to drain completely.
Prepare Vegetables: Wash and chop your produce. Finely dice the English cucumber, slice the cherry tomatoes in half, mince the red onion, and finely chop the fresh parsley leaves.
Combine Salad Base: In a large mixing bowl, combine the fully drained chickpeas, red kidney beans, diced cucumber, halved cherry tomatoes, minced red onion, and chopped parsley. Toss gently to distribute the colors evenly.
Make the Dressing: In a separate small bowl or glass measuring cup, vigorously whisk together the extra virgin olive oil, fresh lemon juice, minced garlic, dried oregano, sea salt, and black pepper until the mixture is fully combined and emulsified.
Dress and Toss: Pour the dressing directly over the salad ingredients. Use two large spoons to toss the salad thoroughly, ensuring every bean and vegetable is coated.
Chill and Serve: Cover the bowl and place it in the refrigerator for at least 30 minutes before serving. This allows the ingredients to marinate and the flavors to deepen. Stir once more right before serving chilled.