For perfect microwave-poached eggs, pour boiling water into ramekin to 3/4 full, and add the vinegar. Crack an egg and gently slip it into the water. Cover with plastic wrap and microwave on high for 30 seconds. Use a soup spoon to gently turn the egg over. Cover again and microwave 15 seconds longer. Remove immediately from water and drain on a paper-towel lined plate.
This produces a runny poached egg. Increase cooking time to 60 seconds total for an egg that is fully cooked.