Combine beef stock, black beans, tomatoes, steak, tomato sauce, onion, green bell pepper, red bell pepper, milk, cumin, fajita seasoning, garlic, lime juice, and red pepper flakes in a large pot over medium heat. Cover pot and simmer for 30 minutes. Add rice and cook until rice is tender, about 30 minutes.
Step: 2
Garnish soup with Monterey Jack cheese, avocado, and tortilla chips.
NUTRITION FACT
Per Serving: 488 calories; protein 29.4g; carbohydrates 44.1g; fat 22.4g; cholesterol 57.4mg; sodium 1201.5mg.