Everyone has giving some great suggestions.
I have almost zero kitchen waste.
We do a good job of cleaning our plates so there is no leftovers. If we do have some the dog gets almost all the leftovers, except ham and pork which usually goes into the bone broth.
Bone are made into bone broth then ground to be added to the garden.
Coffee and tea grounds go into the garden to build up the soil.
What doesn't go into the bone broth, like potato peeling and other scraps are given to the wildlife.