Boil potatoes, remove skin and cube. Grate Velveeta and cheddar and mix together. Melt in saucepan butter, soup and sour cream. Layer in ... to 1 hour, uncovered.
Cook bouillon cubes, water, celery, ... minutes. Add 2 cans of soup (undiluted) and Velveeta and cook until cheese is melted on low heat. Stir occasionally.