To make coriander Nutralite, finely chop coriander and put into a bowl. Add crushed peppercorns and salt and mix well. Grate the rind of 1 lemon and add to the same bowl. Squeeze juice of the lemon and add. Add Nutralite and mix well. .
Place 2 sheets of aluminum foil, one over the other on table top. Place the prepared coriander mixture in center and spread it evenly, roll tightly to make a cylinder and seal its edges. Refrigerate till set
Place fish pieces in a bowl, add sea salt, crushed peppercorns, red chilli flakes and olive oil and rub well.
Place the prepared fish on an induction griller and cook till the grill marks appear on both the sides.
Make a bed of iceberg lettuce and arugula leaves on a serving platter.
Cut the coriander Nutralite into roundels and discard the foil paper.
Place the grilled fish on the bed of lettuce and arugula leaves, top with coriander Nutralite roundels and serve immediately.