Put the meat in a large ziplock bag. For the marinade you will add the juice of the 3 oranges, the juice of the limes, olive oil, red wine vinegar, cilantro, the cumin, sea salt, and black pepper, into a blender or food processor and blend well. Pour it over the meat. Pour the minced garlic, the diced green onions, and sliced orange over the top. Seal the bag, trying not to have much air inside. I spend a minute or two rubbing the marinade into the meat the best I can, make sure it is all covered well. Put the marinade in the refrigerator for a minimum 2 hours, maximum 4 hours.