Creamy Chicken Tortellini Soup with Spinach-Walnut Pesto

Ingredients

• 8 oz dried cheese tortellini pasta
• ¼ cup olive oil
• 1 pound boneless, skinless chicken thighs
• 1/2 teaspoon black pepper
• 1 teaspoon dried thyme
• 1 teaspoon onion powder
• 1 teaspoon garlic powder
• 8 oz sliced baby portobello mushrooms
• 1 teaspoon salt
• 1 cup heavy cream
• ½ cup grated parmesan
• 1½ cups spinach
• 1 cup walnuts
• 3 cups chicken broth