Add everything to the slow cooker except for the fresh spinach and paneer cheese.
Cook on low for 3 hours.
Open and add the fresh spinach. Cook for 1 more hour.
Blend everything using an immersion blender or blending batches. Return to the slow cooker.
Add the cheese (or tofu) and cook for 1 more hour. Serve over quinoa, rice, or with Naan.