Crockpot Cheese Tortellini

I found this, on Pinterest.  There doesn't seem to be the original blog or recipe, that I can find.  This was delicious, a one pot meal, AND Ace told me to put it into our weekly rotation!  It is so easy, the boys can make it!
Crockpot Cheese Tortellini 
 1 (19 oz.) bag frozen cheese tortellini
1 bag fresh spinach
 2 cans Italian style diced tomatoes
4 cups low-fat veggie broth
1 (8 oz.) fat free cream cheese

Set on low setting and 4-6 hours.  Stir it up every once in a while.