Preheat oven to the highest temperature. Grind mustard seeds, sea salt, garlic, ginger and ¼ cup water to a fine paste.
Halve the prawns lengthways and put them in a bowl.
Add salt, squeeze juice of 1 lemon and some chilled water to cover them completely.
Let them soak for a few minutes and drain completely.
Pat them dry on a tissue and put them back into the bowl.
Add red chilli sauce, ground paste, honey and extra virgin olive oil and mix well.
Arrange them on a baking tray in single layer and cook in the preheated oven for 5-8 minutes.
Serve hot immediately.