Here's my grow in a jar salad:
Rinse and pick over 1/4 cup lentils
(I used brown and have sprouted green as well.)
Place in a 1 litre jar (I have fashioned a screen lid for mine to make rinsing easier - cheesecloth could work too)
Fill the jar 2/3 full with water and let sit on counter overnight.
Drain lentils and rinse, swirling the jar to shake up the lentils. Rest in a dark place at room temperature (not fridge).
At least twice a day (more if your house is dry) rinse and drain lentils, making sure you swirl them around to rinse every lentil. Once they've sprouted to your liking, they're ready to use. Store in fridge.
We used ours on top of chipotle chicken unwraps (inspired by - but not nearly as tasty as - the Growing Season's).