Just crack it into a lightly buttered/oiled mug and pop it in the microwave for 45secs-1min. If you like your egg McDs style (extra over easy yolks) then you'll be surprised at the accuracy. Adjust your time depending on your wattage to get the "perfect" egg.
I tried this method today. Pretty much had an explosion in my microwave. What was left of the egg was pretty good to be fair.
The Mrs got some of those flat sausage patties from aldi too. Not bad at all but didn't taste like the McDonald's ones to me