Begin by seasoning the beef short ribs and top the round steak with salt, pepper, and cumin powder on both sides.
Heat a large skillet over medium-high heat and add 1 tablespoon of oil.
Add the beef short ribs and top round steak to the skillet and cook for about 5 minutes on each side until lightly browned and cooked through. Remove from heat when done and set aside on a plate.
Next, prepare the salsa by adding 3 cloves of garlic, 1/4 onion, salt, 8 serrano peppers, 10 tomatillos, 1/4 bunch of cilantro to a blender or food processor along with 1/2 tbsp of chicken bouillon and 3/4 cup of water. Blend until smooth.
Return the skillet to medium-high heat, the salsa mixture, and cook for about 5 minutes, stirring occasionally.
Then, add in the beef short ribs, top round steak, 1/4 onion and stir everything together until combined. Lower the heat to low and simmer for about 40 minutes or until the meat is tender.
Serve with warm tortillas or over rice with your favorite toppings!