Brown Beef and Sauté Onions. Heat a large pot over medium-high heat. Add ground beef and brown it. Add diced red onions and cook until translucent.
Add green chiles, drained black beans, cumin seeds, minced garlic, crushed tomatoes, tomato paste, dried oregano, and chili seasoning mix. Stir well and cook briefly.
Reduce heat to medium-low and simmer for 20-30 minutes. Taste and adjust seasonings, adding more chili powder or spices if desired.
Let the chili cool briefly before serving. Serve hot with optional toppings like shredded cheese, sour cream, avocado, or cilantro.