Rinse dried black beans thoroughly under cold water. Place the rinsed dried black beans in a large bowl, cover with plenty of cold water, and let them soak overnight for at least 8 hours, or up to 12 hours.
2
Drain the soaked dried black beans and discard the soaking water.
3
Peel and roughly chop 100g of the white onion and 15g of the garlic cloves.