Begin by heating a skillet over medium heat. Add the sliced Italian sausage to the pan and cook until browned, about 5-7 minutes.

While the sausage is browning, set your slow cooker to low heat. Once the sausage is ready, transfer it into the slow cooker.

Add the frozen cheese tortellini, fresh spinach, diced tomatoes, and low-fat chicken broth to the slow cooker.

Cut the cream cheese into small cubes and distribute them evenly over the mixture in the slow cooker.

Cover the slow cooker and let everything cook on low for 4 hours, stirring gently every hour.

After 4 hours, check the tortellini to ensure they are tender. If not, cover and cook for an additional 30 minutes.

Once fully cooked, ladle the mixture into bowls and garnish with grated Parmesan cheese and red pepper flakes.