if you have a wee sauté pan or ash shovel you could cook them on that rather than letting the stove die down on a cold day.There's lots of chestnut trees at parkland near me. The best nuts come off trees on the edges facing south.
We've been putting them in the wood burner in the house. Needs to be when the embers are fairly cool and the chestnuts need to be stirred a couple of times- lush treat on a winter evening
How long do you cook them for for?
Looks like quite a laugh, good to see you had fun.