01 -
Heat a large, deep skillet over medium-high heat. Add the diced onion, bell pepper, and ground beef. Sauté, breaking up the beef with a wooden spoon, until the meat is browned and vegetables are softened, about 5–7 minutes. Drain excess grease to prevent a greasy finish.
02 -
Sprinkle taco seasoning evenly over the browned meat and vegetables. Stir well to thoroughly coat all ingredients, allowing the spice blend to bloom for 1 minute.
03 -
Add diced tomatoes with green chilies (including juices), tomato sauce, beef broth, and whole milk. Stir to combine, then add shell pasta, mixing until all pasta is submerged in liquid.
04 -
Bring skillet contents to a simmer. Reduce heat to low, cover, and cook for 10–15 minutes, stirring every 2–3 minutes to prevent sticking. Cook until pasta is tender and most liquid is absorbed.
05 -
Remove skillet from heat. Immediately add shredded cheddar, stirring until cheese is fully melted and sauce is creamy. Season with salt and pepper as desired.
06 -
Spoon hot cheesy taco mac into bowls. Garnish with optional toppings such as chopped coriander, sour cream, or salsa if desired. Serve immediately.