My Grandmother's Cooked Chicken Soup

Ingredients

• 2 tablespoons olive oil
• 1 medium onion, diced
• 2 cloves garlic, minced
• 3 medium carrots, sliced
• 2 celery stalks, sliced
• 1 teaspoon dried thyme
• 1 teaspoon dried oregano
• 6 cups chicken broth
• 2 cups cooked chicken, shredded
• 1 cup frozen peas
• Salt and pepper to taste
• Fresh parsley, chopped (for garnish)