If you have a slow cooker that allows you to saute, go ahead and saute onion and garlic until fragrant and translucent. If your slow cooker doesn't have this feature, then you can do it on the stove top or skip the step entirely.
Add everything except pasta and ditalini to the slow cooker.
Cook on high 4 - 6 hours, or low 8 - 10 hours.
Stir in ditalini and spinach, cover for an additional 10 minutes, until pasta is al dente.
Enjoy!
Notes
Calories are automatically generated. For best results calculate based on your exact ingredients.