In a 2qt microwave-safe dish add 1-1/3 cups water. Heat the water for one minute. Pour the pasta from the box into the hot water (be sure to remove the packet of cheese sauce first!). Stir the pasta and put the uncovered dish in the microwave oven for 5-7 minutes on HIGH (this time may vary depending on your microwave oven). It is very important to stir the pasta every 1-2 minutes to avoid having the pasta stick together. You will know the pasta has been cooked long enough when there is no longer water in the dish. Do not overcook. Once the water is absorbed, remove the dish from the microwave oven. Add 1/4 cup butter or margarine and mix together with the pasta. Next add the cheese sauce that was included in the box along with 1/4 cup milk. Blend all of the ingredients together until the pasta is well coated with the cheese sauce. Enjoy!