The dwarves tending the flames to cook a large amount of hard tack require ever-burning ore to keep the flames hot enough.
'We need ever-burning ore to keep the fires hot enough to cook the hard tack.
'You will need a discerning eye to find the ore. Some veins are rich, some poor, all the ore will help. Travel through the tunnels and find a proper location.'
Make your way through the tunnels and caverns to discover a vein of ever-burning ore to prospect.