Grilled Tequila Garlic Lime Flank Steak

Name: Grilled Tequila-Garlic-Lime Flank Steak
Ingredients: 1 cup roughly chopped garlic (about 3 heads); 3/4 cup fresh lime juice (from about 8 large limes); 1/2 cup silver tequila; 1/4 cup soy sauce; 1 bunch fresh cilantro, leaves and stems roughly chopped; 1 jalapeno pepper, seeded and diced; 1 serrano chile pepper, seeded and diced; 1 tablespoon freshly cracked black pepper; 1 teaspoon ground cumin; 1 1/2 to 2 pounds flank steak