Add the beef to a large Dutch oven, or other heavy bottomed pot, and set over medium high heat.
1 lb ground beef
Add the onion and cook, stirring often, until the beef's crumbled and fully cooked through. Strain off grease.
1 large yellow onion
Add the seasonings and garlic to the meat, and stir until fully incorporated.
salt & pepper, 1 tsp ground cumin, 1/8 tsp cayenne pepper, 1 tbsp minced garlic
Add the broth, milk, enchilada sauce, and pasta to the pot. Stir everything together until well combined.
1 cup beef broth, 1 cup milk, 1 28 oz can red enchilada sauce, 2 1/2 cups medium shell pasta
Bring the mixture to a boil, then immediately reduce the heat to low. Cover the pot and simmer, stirring occasionally, for 10-12 minutes.
Remove the pot from heat and stir in 1 1/2 cups of cheese- just until melted and sauce is smooth.
Sprinkle the remaining cheese evenly out overtop the pasta, cover, and let rest just until melted.
2 cups shredded Mexican blend cheese
Serve warm & enjoy!