Bring water to a boil and cook macaroni according to directions.
When macaroni is at desired tenderness, drain water. Do NOT rinse macaroni in cold water.
Put hot macaroni back in pot and add cubed cheese. Stir to begin melting cheese in the hot macaroni then add milk and heat over very low heat. Stir continuously to prevent sticking.
When cheese is melted through add Rotel and mix thoroughly.