Scallop ceviche with ginger, chilli and corn

500g scallop meat

1 tbsp very finely chopped ginger

½ red onion, thinly chopped

juice of 4 limes

¼ cup extra virgin olive oil

2 wild green chillies, finely chopped

1 bunch coriander, leaves only

1 small sweet potato, peeled, cut into 5mm dice and boiled until tender

1 corn cob, kernels only

sea salt and freshly ground pepper