This is my version of a charcoal chamber. Burn a piece of charcoal on the gas hob until white and ashy. Using a tongs, place it in a ramekin buried within whatever you're marinating. Drizzle with some veg oil and cover the whole bowl with some foil to trap the smoke. Leave it for a few hours, cook as normal, grill/BBQ - it will taste divine. :) In fact you can use this method to infuse the flavour into just about anything, butter, prawns, Halloumi cheese, the possibilities are endless.