With an oiled pan on medium high heat, lightly stirfry garlic and ginger until slightly golden and fragrant.
Place bittermelon into the pan and brown each side (about 1-2 minutes each side). Take out of pan and set aside.
Mix in soy sauce, oyster sauce, sugar and simmer for a few minutes until sauce slightly thickens. If it’s too thick, add a tsp of water
Reduce heat to low and mix in the spring onions. Gently mix the stuffed melons into the sauce for a minute and turn off heat and garnish with black pepper and a few final sprinkles of soy sauce on top. This can be eaten with rice or on its own.