Crock-Pot Chicken Torture*

*So-called because my kids think it's torture smelling it cooking and having to wait for hours and hours before they can eat it!

6 chicken thighs (or more)
1 onion, diced
3-8 cloves garlic, minced
1 1/2 tsp thyme
1/2 cup balsamic vinegar
2 cups diced tomatoes
1/4 cup red wine
1/2 cup chicken broth
1/2 tsp salt
1/2 tsp pepper
1 lb fresh spinach, rinsed and chopped

Place chicken in Crock-Pot. Combine all other ingredients except spinach and pour over chicken. Cook on low 4-6 hours. About 1 hour before it is done, stir in the spinach and allow to continue cooking. Serve over couscous or rice.