I created a new thread for you for this game.
Have you added all the necessary fillings to the omelette? Make sure to click the last ingredient you use back on its container so that you have a free cursor. Then click the omelette to fold it over and wait until it turns golden brown. As soon as it's cooked, just left-click on the omelette to pick it up and place it on the correct covered plate on the top counter.