Tamarillo Spaghetti Sauce by Paul Recher
They make a superb spaghetti sauce. Substitute half of your tomatoes with tamarillos.
Tamarillo Jam by Mark Kickbusch
Cut in half lengthwise and take off stalks. Boil 1 kg tamarillos with 600ml water for 15 minutes. Remove skins, add 1kg sugar and boil another 30 minutes until it sets.