Mediterranean Barley Salad

Name: Mediterranean Barley Salad
Ingredients: 1 cup dry pearled barley; 3 cups water; 3 tablespoons olive oil, divided; 2 zucchini, diced; 1 red pepper, diced; 1 orange pepper, diced; 1 red onion, diced; 1 pint cherry tomatoes, halved; 8 oz white mushrooms, sliced; 4 cloves of garlic, minced; 2 teaspoons dried parsley; 2 teaspoons dried basil; 2 teaspoons dried oregano; 1 teaspoon salt; freshly ground pepper, to taste; 2 tablespoons freshly squeezed lemon juice; feta and fresh herbs, optional, for topping