The brown charred lines on restaurant food are created either by cooking the food on a chargrill or by placing very hot skewers on the cooked food in a trellis pattern. Charcoal-fuelled chargrills, similar to indoor barbecues, are available for home use from some manufacturers of high quality ovens. These slot into the kitchen bench alongside the stove top. Portable electric 'chargrills' are also available from department stores.
A similar effect can be created by using a ridged griddle or pan. Chicken portions, fish, steaks, as well as eggplants, zucchinis and peppers are delicious cooked in this way.
** Asian Recipes