Brown 1 pound ground Italian sausage in a large skillet over medium heat. Drain any excess grease and allow the sausage to cool slightly.
Place the browned sausage, ½ finely diced onion, 2 peeled and diced carrots, 2 diced celery stalks, 1 tablespoon minced garlic, 1 teaspoon salt, 1 teaspoon pepper, 1 teaspoon Italian seasoning, 1 can crushed tomatoes, and 4 cups chicken broth into a crock pot.
Cover and cook on low for 6-8 hours or on high for 3-4 hours.
In a small bowl, whisk together 2 cups heavy whipping cream and 2 tablespoons cornstarch until smooth.
Stir the cream mixture, 16 ounces cheese tortellini, and 2 cups chopped fresh spinach into the crock pot.
Cover and cook on high for 20-30 minutes until the tortellini is tender and the soup has thickened.
Serve warm and enjoy!
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Notes
Refrigerate the leftovers in an airtight container for up to 3-4 days.