Remove the rack from your Leisure grill pan and line with greaseproof paper.
Roughly chop the vegetables into 2 inch cubes, tear the large mushrooms in half and slice the shalllots into rings.
Arrange in a single layer across the tray and drizzle with flavourless oil.
Grill for 20 minutes, turning the vegetables half way through.
To make the sauce put all the ingredients in a sauce pan apart from the spring onions and heat over a medium heat until it begins to reduce and thicken. When this happens, add the spring onions, stir and remove from the heat.
Serve the vegetables drizzled with the soy reduction.