Rinse the shrimps. Cut off the heads and devein if they haven't been cleaned yet.
Shred the cabbage.
Crush, peel and finely chop the garlic.
Peel and dice the onion.
Core the bell pepper, remove the seeds and veins and cut into thin strips.
Heat the cooking oil in a frying pan or wok.
Throw in the shrimps.
Add the diced onion, grated ginger and chopped garlic. Cook, stirring, just until fragrant (about 15 seconds).
Add the shredded cabbage and bell peppers.
Season with a little salt and lots of freshly ground pepper.
Cook for about a minute to a minute and a half, just long enough to cook the shrimps and NOT overcook the vegetables.
Off the heat, drizzle with a little sesame seed oil and you're done.