STUFFED FLANK STEAK (MATAMBRE)

Steps:

• Trim any fat from the meat, split it horizontally and pound it gently with a mallet to flatten. Place meat in a shallow glass dish. Combine the marinade ingredients and pour them over the meat. Cover, refrigerate and marinate 4 to 5 hours or overnight.
• Remove the meat from the marinade, place on a flat surface and sprinkle with salt and pepper. Cover the meat with the spinach leaves and arrange the carrots across the meat.
• Carefully roll the meat jellyroll fashion, so the grain runs the length of the roll, and tie it with a string at 1inch intervals.
• Preheat the oven to 350 degrees F. Heat the oil in a Dutch oven or large pan over moderate heat. Add the meat and sear until browned on all sides, 5 to 7 minutes. Place the roll in an ovenproof casserole dish and pour the beef stock over to cover the meat.
• Place the meat in the oven for 1 to 1 1/2 hours, or until desired doneness. To serve hot, remove the meat and place it on a platter. Let the meat rest for 10 minutes, carefully remove the strings and slice the roll into 3/4 inch slices. Serve with Salsa Criolla.
• In a medium bowl, combine the onions, tomatoes, jalapeno, garlic, parsley, salt and pepper. Whisk together the oil and vinegar in a small bowl and pour over the tomato mixture. Mix well, cover and refrigerate until ready to use. Adjust seasonings before serving with the meat.
• about 2 cups of salsa