Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.

Meanwhile, heat soup in a large saucepan over low heat. Add cheese, stirring until cheese has mostly melted.

Stir in Rotel tomatoes with green chiles and green onion. Simmer over low heat for 2 to 3 minutes, stirring.

Add spaghetti and mix well, then stir in chicken until heated through.

Garnish with extra green onions, if desired. Serve hot and enjoy!