Marinate skirt steak with minced garlic, juice from 8 fresh limes, half of a bottle of Modelo Especial, and salt & pepper to taste.
Next, trim the meat of any excess silver membrane. Place the skirt steak in a tray and pour half the marinade over it, then flip the steak and pour the other half of the marinade over it. Let marinate for 2 hours in the refrigerator.
Once the meat is marinated, bring the steak to room temperature before grilling. When the coals are at their hottest, grill the meat for about 7 or 8 minutes on each side. Let rest for a few minutes and serve.