Cut chives into 4 cm pieces and slice ham thinly.

Place bean sprouts, chives, and ham in a bowl. Add sake, salt and pepper, ginger paste, and sesame oil. Cover with plastic wrap and microwave at 600W for 1 minute 30 seconds. Drain excess liquid.

Crack eggs into a bowl, add a pinch of salt, and whisk.

Heat salad oil in a frying pan over medium heat. Pour half the egg mixture and cook until set. Flip and cook briefly. Repeat with the remaining egg mixture.