Consommé Rice (Mary)

1 onion chopped fine
1 cube butter
4 cups rice
2 cans consommé beef soup
1 can water
Put butter and onion in a microwave dish and cover leaving a space for ventilation. Microwave on high for 8 minutes. Add the rice and mix, add the rest of ingredients and mix well. Cover leaving a space for ventilation. Microwave on high for about 15 minutes, stir every 7 minutes.