Even though it can be done on a grill, remember that smoking is not the same as grilling. Smoking food takes a long time at a low temperature–usually around 225 degrees F., but grilling needs to be done quickly at a high temperature. If you have a traditional charcoal grill, such as the ever-popular Weber One-Touch (the 18 1/2-inch and 22 1/2-inch models range from about $100 to $180), you can smoke food by banking the charcoal on both sides of the kettle and cooking the food indirectly. To produce smoke, add to the coals some wood chips that have been soaked and drained. Place the meat, seafood or vegetables in the center of the cooking grate above the drip pan.
Using a charcoal grill requires some practice and a lot of patience. First you need to get the charcoal burning. The easiest way to do this is with a charcoal chimney, a large cylindrical device with a handle that allows you to pour the hot coals into the grill. Using a chimney is simple: fill the chimney with hardwood charcoal, place a couple of sheets of crumbled up newspaper under the bottom of the chimney and light the paper. In about 15 minutes, the coals will be ready.
A couple of hints about charcoal: use only natural charcoal, charcoal that doesn’t have additives and never use “self-lighting” charcoal. That’s charcoal that’s been impregnated with petroleum products to make them easier to light. Self-lighting charcoal often imparts an off-taste to food, especially when smoking “low and slow.” The same holds true for lighter fluid. It will give food a strange taste that isn’t particularly pleasant.
With a charcoal grill, the fuel and the wood chips need to be replenished on a regular basis. About an hour or so into the cook, start another chimney half-full of coals. When the coals are ash-covered, distribute them evenly over the burning coals. Add more drained chips, cover the grill and continue smoking. Try to replenish the fuel and wood quickly because the longer the cover is off of the grill, the cooler the grill will get, and the longer it will take to smoke-cook the food. (The higher-end Weber Gold models have a hinged cooking grate to make refueling easier.)