Hearty Vegetable and Bean Soup

Name: Hearty Vegetable and Bean Soup
Cuisine: World Cuisine
Ingredients: 1 tablespoon olive oil; 1 onion, finely chopped; 3 cloves garlic, minced; 2 large carrots, diced; 2 celery stalks, diced; 1 zucchini, diced; 1 cup green beans, trimmed and cut into bite-sized pieces; 1 can (14 oz) diced tomatoes; 4 cups vegetable broth; 2 cups cooked mixed beans (e.g., kidney beans, chickpeas, black beans); 1 teaspoon dried thyme; 1 teaspoon dried oregano; 1 bay leaf; Salt and pepper to taste; Fresh parsley for garnish; Crusty whole-grain bread for serving