Crack the eggs into the bowl. Beat them until no streaks of white remain. Beat gently, so you don't make a lot of foam.
Add the milk and salt, and stir until the mixture is an even pale yellow. For an extra-smooth texture, pour it through a fine strainer. Stir in most of the green onion.
Cover the bowl loosely with a microwave-safe plate or a vented lid.
Microwave on high for 1 minute. The edges will start to set. Stir gently, pulling the set edges toward the center.
Cover again and microwave in 20 to 30 second bursts, until the eggs have puffed and the center is set with no liquid on top. In a 1,000-watt microwave, this takes about 2 to 3 minutes in total. Lower-wattage microwaves take longer.
Let it rest, covered, for 1 minute. Lift the cover away from your face. Top with the rest of the green onion, sesame oil, and sesame seeds.