Immediately reduce heat and simmer until thickened to your liking. The longer you cook it, the better it will be.
Serve over cooked shirataki noodles (see post for details).
1 bag shirataki noodles
Video
Notes
If I want my sauce thickened more quickly, I just make myself a five-minute spaghetti sauce by following this recipe but adding a pinch of Glucomannan before I bring it to a boil. This is a miracle thickener for sauces and such. If you have never used it before, trust me, and start out with just a pinch!
Note that this sauce has no sugar in it and just about all store-bought sauces do. That is why I add the extra basil because it is more of a sweet herb to me. If you would like, you can add a tablespoon of Splenda or sugar to this instead.