01 -
Cook penne in a large pot of salted boiling water until al dente. Drain thoroughly and set aside.
02 -
In a large skillet over medium heat, sauté ground beef and chopped onions until the beef is deeply browned and onions are soft. Drain and discard excess fat.
03 -
Add minced garlic to the skillet and cook for 1 minute, stirring frequently. Pour in undrained diced tomatoes with green chilies, mixing well.
04 -
Add salt, ground black pepper, and chili powder if desired. Pour in heavy cream or milk for a creamier consistency, if preferred. Simmer mixture for 2 to 3 minutes until slightly thickened.
05 -
Add cooked penne to the skillet, gently tossing to evenly coat. Stir in shredded cheddar cheese and mix until cheese is fully melted and mixture is cohesive.
06 -
Transfer to bowls and serve immediately. Garnish with additional cheese or chopped green onions, if desired.