Place the red onion, minced garlic, diced pepper, and olive oil in the slow cooker.
Pick over and rinse the lentils and add to the slow cooker.
Add all the other ingredients and stir.
Put the lid on the slow cooker and cook on low for 4 ½ - 5 hours. Check periodically and add more liquid if needed.
Serve over cooked Jasmine rice.
