This soup is a perfect fall weeknight dinner. It is a crowd pleaser!
Place all ingredients, up to and including the tomato paste, into the crockpot. Gently mix together.
Turn on High setting and walk away...for at least 4 1/2 hours - or on low for 8.
At the end of cook time, use an immersion mixer 4-5 times quickly in the pot.
Add pepper jack cheese and stir until melted.
Sprinkle in masa little by little while gently mixing with a wooden spoon.
Top with your garnishes of choice and serve hot.