In a bowl, add the chopped garlic cloves, chili pepper, cumin, oregano, white vinegar, Lee Kum Kee Mushroom Flavored Dark Soy Sauce and Lee Kum Kee Soy Sauce Premium . Place the beef heart chunks into the marinade and mix. Let that marinate for 6 hours, or overnight for best results.
Prepare the skewers with the marinated beef hearts and then season with red pepper flakes.