This is a nice touch, a garnish added to many Keralan curries to zizz them up a little. Make just a bit each time you need it and use it fresh
3 tbspns coconut oil
1 tsp mustard seeds
3 or 4 shallots, finely sliced
10 curry leaves
Fry all the ingredients gently in a little coconut oil till the shallots and leaves are golden
Sprinkle a little over a curry just before serving