Turn empty crockpot on low to preheat.
Meanwhile, use a sieve or colander to rinse beans in water and shake off excess. Add to crockpot.
Add sea salt, whole black peppercorns, garlic cloves with the paper on, and diced onions. If desired, add bay leaves, chipotle peppers, and/or epazote.
Pour boiling water over dried beans and ingredients until water is 2 inches above beans. Cover crockpot and set on low for 7 – 8 hours.
Serve with rice, over a salad, in tacos, or any way you like them.
