Combine the ginger and garlic in a small mixing bowl. Combine the lime juice, soy sauce, fish sauce, sugar and pepper in another mixing bowl ans whisk until the sugar dissolves. Heat the groundnut oil in a large wok over a high heat until hot.
Add the prawns to the wok and stir-fry for 1 minute. Add the ginger and garlic and continue to stir-fry over a slightly reduced heat for 2 minutes.
Add the lime juice mixture to the wok and allow it to reduce by half. Season to taste with pepper. Stir through the basil leaves just before serving.
See more Thai recipes