Added to configuration the action needed to open the cauldron interface. Use the action names available here. Used sneak-to-open: true if you want to combine it with the action.
Code (YAML):menu-title: Compost Cauldron
no-water: '&9Add some water to recyle your trash!'
no-items: '&cNo items to recycle!'
working: '&cThis cauldron is already in use!'