No gluten or casein in this recipe!  

Ingredients

• 2 pounds beef skirt steak
• 1 large navel orange, juiced
• 3 limes, juiced
• 1/4 cup olive oil, plus more for drizzling
• 6 cloves garlic, finely minced
• 1 tablespoon kosher salt
• 1 1/2 teaspoons ground cumin
• 1 teaspoon freshly ground black pepper
• 1/2 teaspoon dried oregano
• 1/2 teaspoon cayenne pepper
• 1/2 onion, thinly sliced
• 1/2 cup fresh chopped cilantro
• 1 teaspoon coarse salt for finishing
• Lime wedges for serving

Directions

1. Cut skirt steaks into about 3 or 4 smaller pieces so it’s easier to fit them into marinade dish.
2. Whisk orange juice, lime juice, olive oil, garlic, salt, cumin, pepper, oregano, and cayenne pepper together in a large bowl. Place skirt steak pieces, 1 at a time, into the marinade to thoroughly coat them. Add sliced onions and toss with the meat.
3. Transfer mixture and marinade to a resealable plastic bag. Squeeze out air, seal bag, and place on a dish. Refrigerate 2 to 3 hours.
4. Transfer pieces of meat onto paper towel-lined rimmed sheet pan to drain for a couple of minutes.
5. Cook over hot coals. Grill first side 3 to 4 minutes. Turn and grill second side until internal temperature is about 125 degrees F (53 degrees C). Look for a shiny glossy surface indicating the meat juice is coming to the surface; this indicates the meat is just about done. Transfer to a plate and allow meat to rest a few minutes.
6. Slice into 1/2-inch slices and arrange on a serving plate. Spoon accumulated juices over the meat. Drizzle with olive oil and sprinkle with coarse salt and chopped cilantro. Serve with lime wedges.

I got this from AllRecipes.com