Prawn toasts with avocado, lime and chilli

6 thin slices of sourdough bread

4 tbsp extra virgin olive oil, plus extra for drizzling

400g cooked prawn meat (from about 1kg of whole cooked prawns)

1 avocado, diced into 5mm pieces

finely grated zest of 1 lime

juice of 2 limes

1 long red chilli, finely sliced

large handful coriander, finely chopped

salt and pepper, to taste