Rinse the squid, score it with a crisscross pattern, blanch for about 30 seconds, then drain well and set aside.
Heat oil in a pan over high heat, add sesame oil, ginger slices, and minced garlic to stir-fry until fragrant. Then add sectioned onions and red peppers to stir-fry.
Add the squid, then stir-fry with the remaining seasonings until the sauce thickens. Finally, add basil and stir-fry evenly before serving.