Ohhh yum, have you ever tried this stuff? We got hooked when we were living in Ecuador. It is easy to make too, I made a whole load when I came back from Ecuador by boiling the cans of condensed milk, but it is rather dangerous and takes about 3 hours. THEN the other day, I found a much easier way to make it.
a tin of sweetened condensed milk
a microwave safe, deep bowl
a microwave !
and a whisk
Pour the condensed milk into the bowl, cook on 600w for 5 minutes, keep an eye on it, it will bubble up and if you're not careful make a right mess of your microwave. Whisk for a minute, return to oven, cook in spates of 2 minutes at 500w, each time, give it another whisk. You will notice it getting thicker, when you get as thick as you like it, stop and allow to cool. I cooked mine for about 15 minutes or so. Spoon into a jar. Don't worry about it going off, it won't last that long LOL.
Enjoy on freshly baked bread, also good on ice-cream. How do you eat yours?