Heat a pot over medium-high heat. When it's very hot, add the beef, seasoning mix, and beef bones. Cover and reduce the heat to low. Stir occasionally to make sure all the pieces are seared.

While the beef releases its juices, peel and wash the tomatillos and rinse the cilantro. Blend together the tomatillos, cilantro, half an onion, one clove of garlic, and half a cup of the seared beef with enough water (about 1 1/2 cups).

Pour this mixture into the pot with the beef. Add the other half of the onion to the broth, another cup of water, and let it simmer for at least 25 minutes.

Serve hot with beans from the pot, sliced radishes, simple guacamole (blend avocado, onion, cilantro, water, salt, and lime juice), spicy tomato salsa (cooked tomatoes blended with árbol chiles and salt), chopped cilantro and onion, sautéed spring onions, chopped and fried bacon, and corn tortillas.