Slow cooker Creamy Tortellini, Spinach and Chicken Soup

This soup is a fan favorite on r/slow cooking.
It has become a family favorite that we have at least once a week. I cook mine on the stop top but it does work well in a Crock-Pot. I just prefer making soup on the stove.

Creamy Tortellini, Spinach and Chicken Soup

1 medium onion chopped
1/3 cup flour
1 tbsp dried basil
2 cloves garlic, minced
2 tbsp tomato paste
3 tbsp olive oil
4 cups chicken broth
2 (14.5oz) cans petite diced tomatoes
1-1 1/2 pounds boneless, skinless chicken thighs
1 tsp salt
1/2 tsp pepper
4 cups fresh or frozen cheese tortellini
3 cups packed spinach, more if you want
1/2 cup parmesan cheese
1 cup of heavy cream or 1 cup half and half warmed

How to

1. Put the onions, flour, basil, garlic, tomato paste and olive oil in a pan. Cook for 5 minutes on medium heat. If using a crockpot transfer this to it at this point. If doing it on the stove don't do anything.

2. Add broth, tomatoes, chicken, salt and pepper. Stir it all together.

3. Cover and cook on low 4-6 hours or high for 3-4 hours. Or until chicken is tender.

4 Remove the chicken. Add the tortellini, spinach, parmesan cheese and warm cream.

5. Shred or cut chicken into bite size pieces and return to the pot. Cove and cook until tortellini is cooked through.

6. Serve and enjoy. I like serving it with some warm french bread.