In a bowl, mix olive oil, Worcestershire sauce, cumin, oregano, honey, and reserved adobo sauce.
Whisk to combine.
Pour marinade over flank steak, coating both sides. Cover and marinate in refrigerator for at least two hours. I prefer overnight.
Remove flank steak from fridge.
Grill over high heat, only about 1 1/2 to 2 minutes per side until rare/medium rare. Remove from heat and allow meat to rest a few minutes.
Slice very thin shingles of meat on an extreme diagonal.