You threw it away?????
You should have put it back in the oven and baked it longer when you realized it was not done, Misplaced- oven temps vary, pan sizes vary, the temp of the water put in the water bath varies, the temp of the raw batter varies. A bit jiggly in the center is fine but it must get at least that "done." A water bath is very important to this cake- because of the type of ingredients in the recipe, it could easily bake too much on the edges while leaving the inside raw and the water evens out the temps around the cake to do just that. Having a pan of water underneath the cake, on another rack, unfortunately does nothing for the cake. It is not like baking French bread where you just need the moisture in the oven.
This kind of cake, flourless, is very forgiving and could be "re-baked" later- you could have saved it.
This recipe is MANY times T&T and has worked for me every single time with no trouble. If it looks like it isn't baked enough, bake it more. I have had to do that in the past because of all the variables.