Cut the bitter melon in half lengthwise, remove seeds and pith, and slice thinly.

Slice the garlic thinly and remove the core. Cut the boiled octopus into bite-sized pieces and thaw the shrimp, patting them dry.

Heat olive oil in a frying pan over medium heat, add garlic, and cook until golden brown. Remove garlic from the pan.

Add bitter melon to the pan and stir-fry over medium heat for about 3 minutes. Then add octopus and shrimp, stirring to combine.