1 1/2 tablespoons peanut oil
500g chicken stir-fry strips
2 garlic cloves, crushed
3cm piece ginger, peeled, finely grated
4 green onions, cut diagonally into 3cm lengths
1 long red chilli, deseeded, finely chopped
1 bunch choy sum, trimmed, chopped
2 tablespoons oyster sauce
1/3 cup unsalted roasted cashew nuts
1/2 cup Thai basil leaves (see note), torn
steamed basmati rice, to serve