Hilachas (Guatemalan Shredded Beef in Tomato-Tomatillo Sauce)

Name: Hilachas (Guatemalan Shredded Beef in Tomato-Tomatillo Sauce)
Prep time: 20 min
Cook time: 3 h
Total time: 3 h 20 min
Cuisine: Latin American, American, Mexican
Ingredients: 2 lbs beef flank steak or 2 lbs skirt steaks, cubed; 5 cups water; 2 -3 tablespoons oil; 1 onion, chopped; 1 cup tomatoes, chopped; 1 cup tomatillo, chopped; 2 -3 guajillo chilies, warmed over a flame, deseeded and chopped; salt and pepper, to taste; 1 lb potato, peeled and chopped; 2 -3 carrots, peeled and chopped; 1/2 cup breadcrumbs; 1 bunch cilantro, chopped