Marinated Steak with Caramelized Onions and Balsamic

Directions

1. Empty the coke and the lime juice into a Ziploc bag and add the steak. Place the meat into the refrigerator and marinate for at least 6 hours.
2. Prepare the grill on medium-high heat.
3. In the meantime, heat the butter over low heat in medium-sized sauté pan and add the onions. After 4 minutes, add the sugar and sauté for 35 minutes, stirring occasionally
4. Pour in the balsamic vinegar, stir and set aside covered to keep warm.
5. Grill the steak for 3-1/2 minutes per side, flipping once, for a medium-rare doneness. Cut the meat into strips and add to the pan with the onions. Toss all of the ingredients together and serve immediately.