So ideally you want to prepare this in your biggest tallest pot you have. That way you are minimizing having to get up, trudge all the way over to the kitchen, drawn some water "how tedious" and top your pot. I used an asparagus cooker, just a tall pot with a removable strainer. You don't really need the strainer, but I invert it and throw it over top of the can while its cooking. It gives a false sens of security that should I let the pot boil dry it will contain the sugary blast. Anyway, lets go over the procedure.
- Plunk your can in the bottom of the pot
- Fill with water till about 2 inches from the top
- Put it on the stove to boil - Maximum heat
- As soon as it begins to boil, drop the heat to about 3 or just above simmer - Basically almost as low as the temperature on your stove allows
- Find something to do for 14 hours! somewhere in the house. Check it every couple of hours just to be safe, if its getting low on water just top it up with hot water from the tap. I had to top up my pot once but this depends on the size of pot used.
Toss it in the fridge to use the next day, you should let it cool till its at least only warm feeling in your hand. In theory if you open it while its hot it could burst a little - but, I have never tested this and neither should you!