Chicken Spinach and Tortellini Soup

Ingredients

• 2 tablespoons olive oil
• 1 onion, chopped
• 3 cloves garlic, minced
• 2 carrots, sliced
• 2 stalks celery, sliced
• 4 cups chicken broth
• 2 cups cooked chicken, shredded
• 1 teaspoon dried thyme
• 1/2 teaspoon dried oregano
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 package (9 ounces) cheese tortellini
• 4 cups fresh spinach
• 1/4 cup grated Parmesan cheese