Heat The Oil In A 4-Quart Saucepan Over Medium-High Heat. Add The Ham And Onion And Cook Until The Onion Is Tender. Stir The Soup In The Saucepan And Heat To A Boil. Reduce The Heat To Low. Add The Cheese And Cook And Stir Until The Cheese Is Melted. Add The Noodles And Cook Until The Mixture Is Hot And Bubbling.