Heat a large skillet with high sides and a lid over medium-high heat. Add the ground beef then brown, breaking it up as it cooks. Drain the beef if necessary then return it to the skillet.
To the skillet add the cornstarch, seasonings, hot water, milk, and pasta then stir to combine and bring the liquid to a simmer - NOT a boil. Place a lid on top, turn the heat down to medium/medium-low, then gently simmer until the pasta is al dente, 8-10 minutes, stirring a couple of times.
Turn off the heat then add the cheese and stir until smooth and creamy. Let the dish cool for 5 minutes, or until the sauce has slightly thickened, then serve.