Peel and finely dice the shallot and ginger. Wash the chillies, halve lengthwise, remove the seeds. Chop the pod finely. Cut the mango pulp from the stone, dice the pulp on the skin (approx. 1 cm edge length), cut from the skin.
Wash the lime in hot water, finely grate the peel. Halve the lime. Squeeze the juice of 1/2 lime. Wash the coriander, dab dry and, except for a little to garnish, roughly pluck. Wash the sprouts. Mix shallot, ginger, chili, mango, lime zest, coriander and sprouts.
Mix in 2 tablespoons of oil and season to taste with salt, sugar and lime juice, leave to stand. Meanwhile wash the fish, dab dry and cut in half lengthwise. Season with salt, put on skewers and roll in sesame seeds.
Heat 1/2 tablespoon of oil in a frying pan. Fry both skewers for about 5 minutes, turning once. Arrange mango sprouts salad and plaice fillet saté skewers on a plate. Garnish with coriander.