In a wok fill about one third of water and cover and bring to a boil.
On a cutting broad slice the bitter melon lengthwise and remove the seeds with a spoon and set aside.
In a mixing bowl combine pork, green onion, egg, salt, pepper, sugar, ginger, oyster sauce, wine and cornstarch and mix together and divide the pork mixture into four and place the pork mixture into each shell bitter melon and place into bamboo steamer and cover into the wok with the boiling water for 20 minutes.
In a saucepan add in the chicken broth, oyster sauce, onion powder and sesame oil and bring to a boil add in some cornstarch roux for from a light sauce.
After the bitter melon is steamed remove from the bamboo steamer and plate the bitter melon onto a serving plate and top with the sauce.