1.Cut leek in half, cut into 3cm pieces. Add leek to pan of boiling water, boil until just tender; drain.
2.Cut along centre back of prawns, remove vein, flatten prawns slightly.
3.Heat oil in wok, stir-fry prawns and garlic for 2 minutes. Add sauce, sugar and peppercorns, stir-fry until prawns are tender. Serve prawns over leek. Add peppercorn sauce, sprinkle with coriander.
Best made just before serving; prawns can be prepared 6 hours ahead.
Note
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