In A Microwave-Safe Bowl, Combine The Cheese And Milk. Microwave, Uncovered, On High For 2 Minutes Or Until Cheese Is Melted; Stir Until Smooth. Stir In The Rice, Ham And Spinach. Transfer To A Greased 1-1/2-Qt. Baking Dish. Cover And Bake At 350 Degrees F For 25-30 Minutes Or Until Heated Through.