Carne Guisada - cooking recipe

Ingredients

2 tablespoons cooking oil
1 lb beef stew meat, cubed
3 ounces tomato paste
10 fluid ounces homemade beef broth
4 fluid ounces water
3 garlic cloves, crushed
1 teaspoon chili powder (or more)
1/2 teaspoon ground cumin (or more)
1/2 teaspoon ground black pepper
salt
2 serrano chili peppers (seeded or not and chopped, (or more)
2 teaspoons cornstarch

Preparation

Heat oil in a large saucepan over medium high heat, and cook beef until evenly brown.
Pour off excess fat and then stir in tomato paste, beef broth and water.
Season with garlic, chili powder, cumin, black pepper, salt and serrano peppers.
Reduce heat, and simmer (or place in a crockpot on low setting) for 8 to 12 hours--the longer you allow it to cook, the more tender the beef will be.
Dissolve cornstarch in a small amount of water, and stir into simmering stew until thickened, about 5 minutes.
Serve with Mexican rice and/or homemade tortillas.