Season the chunks of chuck roast with salt and pepper and sear on high heat in a little olive oil to give them some color (color adds flavor!).
Add in the beef bones, the water, garlic cloves, and onion halves. Sprinkle with a litlte more salt and pepper, and bring to a boil. Cover, and reduce to a simmer. Simmer for 30 minutes.
Uncover and skim off any foam or grease that has accumulated at the top.
Add the carrots, zucchini, squash, corn, and cabbage. Cover and continue simmering for 30-45 minutes.
Turn off the heat and serve hot with whatever garnishes you like such as lime wedges, hot sauce, corn tortillas, jalapenos, cilantro, red onion, radishes, avocado, etc.