Brown the beef: In a large pot, cook the ground beef over medium-high heat until browned.
Add aromatics: Toss in the diced onion and cook 2–3 minutes until softened.
Season it: Stir in both packets of taco seasoning and the tomato paste (or tomato sauce). Mix well until the beef is coated.
Combine the pot: Add pasta noodles, both cans of green chiles/green chilies, and pour in 2 to 2½ cups beef broth. Stir together.
Simmer to finish: Bring to a gentle boil, then lower heat to medium and cook 8–10 minutes, stirring often, until the pasta is tender and most liquid is absorbed.
Cream it up: Remove pot from heat. Stir in sour cream or Greek yogurt until smooth and creamy.
Cheese it: Add the full bag of Kraft Natural Mexican Shredded Cheese and stir until melted and saucy.
Serve: Scoop into bowls and top with cilantro or green onions if you like a fresh finish.