MAKE IT AGAIN AND AGAIN!
Combine ingredients in your slow cooker. Stir a few times and cover.
Cook on HIGH for 3-4 hours or on LOW for 7-8 hours. Each slow cooker cooks a little differently, so exact time will depend on your unique slow cooker or crockpot. Cook until lentils are tender and most of the liquid has cooked off.
Use a slotted spoon to portion out lentil taco filling into tortillas, over rice, greens or however you opt to enjoy this taco filling. Top with sliced avocado, extra red onion, cilantro or whatever your favorite taco toppings are.
Let leftovers cool and store in air-tight container in fridge for up to 3 days.