Method:
Cook beef in a large pot over medium heat until browned and cooked through. Remove from pot, set it aside and pour off all but 1 tablespoon of the fat. Add onion, bell pepper and garlic and cook over moderately high heat until softened, about 4 minutes. Add broth, water, potatoes, cumin and bay leaf. Bring to a simmer and cook for 10 minutes. Add pasta and simmer until al dente, about 5 minutes. Return browned meat and cook until warmed through, about 1 minute. Discard bay leaf, taste and adjust seasoning with salt and pepper, and serve.