I'm sure Fro has her own way of doing balsamic glaze, so will want to see what she has.

In the meantime, here's my way of doing balsamic glaze:

Pour two cups of balsamic vinegar (I just buy whatever's in the store like Kraft balsamic vinegar in the salad dressing area) into a small sauce pan and bring to a boil.

Once you've got a boil, reduce the heat to medium-low and allow the vinegar to simmer for about 20-30 minutes or until it has become thick enough to coat the back of a spoon (you should have about 1/2 cup of glaze when it's done).

Remove from heat and allow to cool. Then just pour it into a container with a lid and pop it in the fridge. It should last you a few weeks (or a few days if you're going to try a few samples of Fro's recipes). I will sometimes microwave a small portion for up to 10 seconds if I want it particularly drizzly to pour over some recipe.

I don't do this, but some people like to add a bit of sugar to sweeten up the glaze while cooking.