Time and again he rose to re-heat the stones and replenish the fire.
They continue to burn when once lighted, and there is no need to re-heat them from time to time.
Season the resulting pure with salt and pepper, re-heat, and serve as a vegetable.
But the verb really in question is, per se, a perfectly plain one, to re-heat.
If part of a dish of beans remain after a meal, ...