Vegetarian Pea Soup

Ingredients

• 1 package (16 ounces) dried green split peas, rinsed
• 1 medium leek (white portion only), chopped
• 3 celery ribs, chopped
• 1 medium potato, peeled and chopped
• 2 medium carrots, chopped
• 1 garlic clove, minced
• 1/4 cup minced fresh parsley
• 2 cartons (32 ounces each) reduced-sodium vegetable broth
• 1-1/2 teaspoons ground mustard
• 1/2 teaspoon pepper
• 1/2 teaspoon dried oregano
• 1 bay leaf