50g/1戮oz red chillies, finely chopped
3 tbsp garlic, finely chopped
1 lemon, cut into wedges
150驳/5陆辞锄 onion, finely chopped
2 tbsp finely chopped spring onions
salt and freshly ground black pepper, to taste
5 tbsp olive oil
100g/3陆oz cold butter, cut into small cubes
4-6 large uncooked, unpeeled prawns