Step 1

Add all of the ingredients except for the heavy cream to the slow cooker.

Step 2

Cover and cook on low for 6-8 hours or high for 3-4 hours.

Step 3

Puree the soup with an immersion blender.  Or, puree the soup in 3-4 batches in a regular blender and return to the slow cooker.

Step 4

Stir the heavy cream into the soup if using.

Step 5

Serve immediately.