What to do with dried vegetables that feel like a chewing gum?
Of course they will be the texture of thinly sliced rubber tires when eaten raw.

What you want to do is rehydrate them. Probably the easiest way would be adding them to a stew and simmer / boil them until the entire dish is done. You will need some extra water, though.

You could also try soaking them in water over night like one does for dried fruit / muesli, then drain and use them.