Stir-fried Bitter Melon with Salted Egg Yolk and Minced Pork

Prepare the bitter melon: Halve the bitter melons lengthwise, scoop out the seeds and white pith with a spoon. Slice them into 0.5 cm thick pieces. Blanch the bitter melon slices in boiling water for 1-2 minutes, then drain and rinse with cold water to reduce bitterness. Set aside.