In A Large Saucepan, Cook Rice Mix In Butter Until Golden Brown. Stir In Water And Diced Tomatoes; Bring To A Boil. Reduce Heat; Cover And Simmer For 15-20 Minutes Or Until Rice Is Tender. Meanwhile, In A Large Skillet, Cook Beef Until No Longer Pink. Drain And Add To The Rice. Stir In The Cheese, Stewed Tomatoes And Cheese Sauce; Cook And Stir Until Cheese Is Melted. Keep Warm. Serve With Tortilla Chips.