Prepare grill for direct cooking over lump charcoal. Wash and paper towel dry vegetables.
Place Roma Tomato (6), Red Fresno Chili Pepper (2), Jalapeño Pepper (1), White Onion (1), Garlic (1 bulb), and Lime (1) on hot grill. Cook until outer skin chars turning often about 5-10 minutes total.
Cool on cutting board and roughly chop.
Add vegetables to a food processor along with Ground Cumin (1/3 tablespoon) and several pinches of Salt and Pepper (to taste). Pulse food processor until all ingredients are combined.
Pour into a bowl and refrigerate for an hour. Add Fresh Cilantro (1/4 cup) before serving.
Make the Tequila Lime Marinade: Combine Worcestershire Sauce (1/4 cup), Olive Oil (1/4 cup), Water (1/4 cup), Tequila (2 fluid ounce), Lime Juice (2 fluid ounce), Fresh Cilantro (2 tablespoon), Garlic (2 clove), Salt (1 teaspoon), Ground Black Pepper (1 teaspoon), and Ground Cumin (1 teaspoon).
Place Flank Steak (2) in a gallon ziplock bag and pour marinade over the steaks. Close the bag removing as much air as possible. Gently move the steaks around to cover completely in marinade. Rest in refrigerator for 2 hours.
Prepare Santa Maria or other charcoal grill for direct grilling with 2 chimneys of B&B Lump Hickory Charcoal.
Remove flank steaks from marinade allowing excess marinade to drip off. Season the outside with Kosher Salt (1 tablespoon) and Coarse Black Pepper (1 tablespoon).
Grill each steak close to the hot coals for 1 ½ minutes on each side. Raise the grill grate away from the hot coals and continue to cook to desired doneness, 125 degrees F (51 degrees C) internal for medium rare.
Rest flank steaks for 5-10 minutes on cutting board loosely tented with aluminum foil.
Place Flour Tortilla (1 package) on grill grate just above the hot coals to warm about 30 seconds on each side.
Slice flank steaks across grain into thin strips.
To assemble tacos: Spoon Guacamole (1 cup) on warm tortilla shell followed by strips of flank steak. Top with Fire Roasted Salsa, White Onion (1), Fresh Cilantro (1/4 cup), squeeze of Lime (1), and a few dashes of Hot Sauce (to taste).