Sambal prawns with coconut and cashews

Flavourless cooking oil (such as sunflower or grapeseed) or coconut oil

20 medium raw prawns, peeled, tails on, defrosted if frozen

2 garlic cloves, peeled and crushed, or 2tsp garlic paste

4 long red chillies, deseeded and finely diced

200g green beans, trimmed and cut into 5cm lengths diagonally

1tbsp kecap manis

½tsp coconut sugar or brown sugar

Large pinch of fine sea salt

60g roasted salted cashews