Melt butter in microwave-safe dish in microwave for 30 seconds (uncovered).
Put ingredients into the melted butter, gently tossing to coat. Cover with plastic film, and pierce a hole in top. Cook 2½ minutes on high. Remove and let sit (so that steam subsides), say one minute.
Meanwhile beat two eggs and pour them over the ingredients and with a spoon stir to make sure eggs travel right through to the base of the dish. Cover with plastic film again and microwave for a further 1½ minutes.
Let sit a further 1½ minutes to complete cooking and gently remove the plastic before serving.