For the marinade
4 garlic cloves, chopped
150ml/5fl oz soy sauce
2 tbsp red wine vinegar
2 tsp worcestershire sauce
½ tsp dried oregano
½ tsp ground cumin
sea salt and freshly ground black pepper

For the stir fry and chips
600g/1lb 5oz fillet steak, cut into 3cm/1¼in cubes
vegetable oil, for frying
1 large red onion, cut into thick wedges
2 tomatoes, halves, seeds removed and cut into eighths
1 amarillo chilli, seeds removed and sliced lengthways
2 tsp pisco
25g/1oz fresh coriander, finely chopped
10g/¼oz fresh flat-leaf parsley, finely chopped
600g/1lb 5oz chipping potatoes, peeled, cut into chips
sunflower oil, for deep frying