When you have a job at the restaurant, this trick will be very useful. Stand in front of the refrigerator, but not enough so that the chef cannot get through to it. When a chef opens the refrigerator door, click near the center of the fridge and options will appear. Choose the "Carry" interaction and your Sim will pick up the food out of thin air. Serve the food to the customer, and you will get better payouts because of the fast service.