Combine garlic, olive oil, limes, salt, black pepper, sugar, cumin, Worcestershire sauce in a bowl.
Place skirt steak in a resealable plastic bag and rub the marinade all over the meat.
Let them marinate in the fridge for at least 2 hours
Preheat the grill to high heat
Grill skirt steak for about 5 minute each side.
Serve with Suddenly Grain Salad™ - Southwest Grains and grilled vegetables