Spaghetti with Lentil Ragu

My friend Anjalika taught me this and it is wonderful. The kind of thing I want to make very often, served with a mixed green salad. If you are making and serving the lentils right away, these liquid amounts are good. However, if you will be making the lentils ahead of time they will absorb water as they sit, so you will need to add a little more water when heating through before serving. Sometimes I like to tear in a little fresh mint wit