Combine steak, salsa, oil, lime juice, garlic and tequila, if using, in a large plastic zipping bag. Seal bag and turn to coat steak; add vegetables and turn to coat. Refrigerate at least 2 hours. Remove meat and vegetables from bag, reserving marinade; grill both for about 5 minutes per side, or until meat is medium-rare. Thinly slice meat and vegetables; arrange over warmed tortillas. Heat remaining marinade to a boil; drizzle over top. Sprinkle with cheese and roll up.
Tip: Fill fajitas with grilled vegetables and cheese for a satisfying lighter meal.
This Sirloin & Veggie Fajitas recipe is from the Our Favorite Grilling Recipes Cookbook. Download this Cookbook today.