TO MAKE PASTE, peel the garlic and ginger and chop roughly. Quarter the tomatoes and remove the seeds. Chop roughly. Place all the paste ingredients in a food processor or blender (in batches) and process to a fine paste. Lightly smear both sides of the fish fillets with the paste and set aside.
TO MAKE SAUCE, peel the shallots or onions and chop roughly. Roughly chop the