Add browned and drained sausage to a slow cooker.
Add broth, tomatoes, bouillon cube, garlic, oregano, and cream cheese.
Cook on low, stirring occasionally, until the cream cheese has melted.
Add tortellini and spinach. Give it a stir and cook about 30 minutes, or until tortellini is tender and spinach has wilted.
Serve with garlic bread, if desired.