Heat a large skillet over medium-high heat. Cook and stir beef in the hot skillet until browned and crumbly, 5 to 7 minutes.
Stir pasta and cheese mixture from the macaroni and cheese package into the beef. Add tomatoes, milk, peas, and corn to the beef mixture; stir. Bring the mixture to a boil, reduce heat to medium-low, place a cover on the skillet and cook at a simmer until the noodles are tender, about 12 minutes.
Season the dish with seasoned salt. Stir about half of the Cheddar cheese into dish to melt. Top with remaining cheese.