Chicken and king prawn spice bag

750g chicken wings

200g raw king prawns

4 tsp potato starch or cornflour

1 ½ tsp baking powder

4 portions of oven chips

1 large onion

2 bell pepper, one each of red and green

2 cloves garlic

Some ground black pepper

For the spice mix:

2 ½ tsp flaky sea salt

½ tsp chilli powder

1 tsp white pepper

1 tsp onion salt

1 tsp five-spice powder