I followed this recipe as a starting point: https://www.seriouseats.com/mujaddara-rice-with-lentils-and-caramelized-onions-11947705

The only major difference I made was using half red lentils and half brown lentils and adjusting the cook time accordingly. The onions were delicious but I think I would cook them for a bit longer next time, even if it goes against what the recipe guidelines are.