Rinse the lentils thoroughly and soak them in water for about 2 hours.
Rinse the oats and brown rice thoroughly.
Place the rice (brown rice), oats, and lentils into a pot or electric rice cooker.
Add water at 1.2 times the amount of the ingredients.
Add a small amount of salt and mix.
Cook using the brown rice setting on the rice cooker.
Gently mix the cooked rice and serve it in a bowl.