Put stock in a medium saucepan and keep hot over low heat.

In a separate pan bring the stock to a simmer, and keep hot.

It should be served at once and not kept hot over water for hours - this can kill even the best food.

There are various laws governing how this food is kept hot and served.

Lower the heat and keep hot but do not boil.

The stove in the car was kept red hot, but we froze.

"I was only going to ask why the room had to be kept so hot."

Heat stock until it is very hot, and keep hot.

The dinner was brought in, and had to be set by the fire to keep hot.

The fire pit is prepared the night before the final day and kept red hot throughout the ritual.