Vegetarian White Bean Soup

Ingredients

• 2 small zucchini, quartered lengthwise and sliced
• 1 cup each chopped onion, celery and carrot
• 2 tablespoons canola oil
• 3 cans (14-1/2 ounces each) vegetable broth
• 1 can (15-1/2 ounces) great northern beans, rinsed and drained
• 1 can (15 ounces) cannellini beans, rinsed and drained
• 1 can (14-1/2 ounces) diced tomatoes, undrained
• 1/2 teaspoon dried thyme
• 1/2 teaspoon dried oregano
• 1/4 teaspoon pepper
• Minced fresh oregano, optional