Rinse the beans

• Rinse the dried beans under cold water and pick out any debris.
• Drain them in a colander.

Start the pot

• Dump the whole bag of beans into a large pot.
• Add the onion half and the garlic cloves.
• Cover generously with water.

Boil the beans

• Bring the pot to a boil over high heat.
• Lower the heat and let it simmer, partially covered, until the beans are tender and the broth is rich.

Season and serve

• Season with salt to taste.
• Serve hot, for example alongside carne asada.