In a large pot over high heat, combine water, macaroni, dried onion, salt, and hot sauce.
Bring to a boil, stirring occasionally.
Cover and reduce heat to low. Simmer until macaroni is tender, about 12 minutes.
Remove from heat. Do not drain - there should be a little water left. Stir in cheese until melted and smooth. If it seems dry, add up to 1/2 cup milk.
Serve warm alongside a salad or steamed veggies.
*If you have little bits and ends of cheese, take this opportunity to use them up!
One-Pot Macaroni & Cheese https://www.cheapskatecook.com/frugal-fast-one-pot-macaroni-cheese/