Tom Yum Noodle Soup
THAI TASTIC SERVES 4 * PREP 30 MINS * COOKING 30 MINS 2 tbs vegetable oil 16 (about 500g) green prawns, peeled, deveined, heads and shells reserved 6 makrut lime leaves, bruised 5 fresh red birdseye chillies, lightly bruised, plus extra, thinly slice