In a medium saucepan, bring quinoa and water to a boil. Cover, reduce heat to low, and simmer until for 15 minutes, or until quinoa is tender. Remove from heat and let stand for 5 minutes, covered. Remove lid and fluff with a fork. Transfer quinoa to a large bowl.
Meanwhile, blanch the green beans. Bring a large pot of salted water to a boil. Add the green beans and cook until tender crisp, about 2 minutes. Drain the green beans and place in a bowl of ice water. Drain well and pat dry.
Add the green beans, garbanzo beans, white beans, red bell pepper, yellow bell pepper, cucumber, grape tomatoes, diced red onion, crumbled feta cheese, kalamata olives, and chopped fresh basil to the bowl with the quinoa.
In a small bowl, whisk together the olive oil, balsamic vinegar, garlic, basil, oregano, salt, and pepper. Pour dressing over the salad and gently stir until salad is coated with dressing. Season with additional salt and pepper. Serve.
