Fill a medium size sauce pan with water. Cover and bring to a boil. In the meantime, prepare your green beans. If your beans have strings, remove those. Wash and drain your beans. Trim the ends and cut into ½ inch pieces. Once the water has come to a boil. Blanch your beans for 3-4 minutes. Drain beans and drop them into ice water to stop the cooking.
Carefully remove the corn from the cob.
In a large serving bowl start mixing your vegetables. Add your green beans, corn tomatoes, cucumber, both types of onion, carrots, zest & juice of lemon. Next add your herbs, salt, pepper, feta, and olive oil.
Slowly fold all of your ingredients together. The lemon juice, olive oil, and feta cheese will start to blend together as you stir your vegetables. It will create a wonderful dressing for your salad. Adjust your salt and pepper to your preference.