
Season the beef with garlic, salt and pepper.
Put a wok or a pan over very high heat. Stir in oil and cook the meat, a few slices at a time (so they do not steam and the meat browns). Cook each batch 2 minutes.
Stir in the onion, tomato, chili pepper, and stir for about 2 to 3 minutes. The tomatoes and onions should be crunchy, not mushy. Stir in soy sauce and vinegar on sides of wok or pan. Mix everything. Add beef broth and cook 1-1/2 minutes. Taste for seasoning.
Turn off the heat, add chopped cilantro and serve at once with French fries and white rice.