To cook
delicate foods, there's nothing quite as
effective as a double boiler. It is also
quite useful in warming food.
Generally, a double boiler
consists of two pans; the lower pan, in
which water is placed to simmer, and the
upper pan, into which goes the food.
Remember to use them on
gentle-to-moderate heat.
You can create a makeshift
double boiler using the universal unit
below, or by placing a smaller pan (for the
food) inside a larger one (for the water),
and elevating it with a trivet of some sort.