Placing a steel disk inside a non-ferrous pan using an inductive stove I have an inductive stove, and some very large pots that don't work on the stove.  It seems that the material is invisible to the induction coil, and if I were to place a steel disk inside the pot, then that steel disk would act as a heating element.  Would this work?

This would be for liquids, boiling large amounts of mostly water (bone broths, beer, etc.), so the cooking surface isn't really a factor.

edit: The stainless pots I'm using are quite thin.  I have tried placing them on a cast iron skillet similar to the adapter idea, but that doesn't work well at all.  I am hoping the disk would heat, and being inside the pot, would be much more efficient.  I could also test with some generic bits of steel I can find.  I thought I'd ask first.
The usual approach would be to put the steel disk under the pot. Such disks are even produced commercially for this purpose: look for an induction interface disk. The basic mechanism is straight forward. The disk heats due to electromagnetic induction; then heat moves from the disk to the cooking vessel via conduction. As long as your cooking vessel is a good conductor and the bottom of the pan is in direct contact with the disk, it will heat up relatively efficiently.

Putting the disk inside the cooking vessel seems iffy. If your cooking vessel has a thick bottom, then the disk will be further from the stove-top. Because the magnetic field strength decreases with distance, induction would be less efficient. Also, if the disk is inside the vessel, it will come into contact with the food and probably need to be washed. Putting it under the pot leaves one fewer item to wash.