induction cooking with diamonds and inert gas

Diamonds are paradoxically:1) Better thermal conductors than any metal, 2) Electrical insulators, and 3) Readily heated by magnetic induction. And synthetic, industrial grade diamonds can be made in bulk (relatively) cheaply.

So - Build a top-loading induction oven. Fill it approximately 1/3 to 1/2 full with tiny, industrial grade synthetic diamonds. Take whatever you're cooking and wrap it in either aluminum foil or a high temperature flexible silicone sheet (the kind used for baking pans). Plop this into the over, fill the remaining space with more diamonds. The many tiny stones will press the wrapping around the food, ensuring even cooking.

Close the lid, start cooking. When ready, remove your meal, wait for the diamonds to cool off, and scoop them out for future use.

Diamonds will burn in air at 1562F, most cooking should not reach that temperature. But to prevent degradation it might be a good idea replace the air in the oven with argon - and then you could cook at a few thousand degrees, Maybe not food, but a convenient way to dispose of a body.