In a large sauté pan with a lid, brown the ground beef and onion over medium high heat.
Once browned, drain any excess fat from the beef.
Add the garlic, ketchup, chili powder, paprika, salt, and pepper and mix well.
Add the beef broth and milk and bring to a boil.
Once boiling, add the gluten free macaroni, cover and reduce the heat to low.
Simmer for 14 minutes or so, until the pasta is cooked.
Once the pasta is cooked, turn off the heat, and add the cheese in batches and stir until melted.
Serve in bowls topped with chopped parsley, if desired.