What You'll Need:

• 1 1/2 pounds boneless beef top sirloin, cut into thin bite-size slices
• 1/2 teaspoon salt
• 1 teaspoon freshly ground black pepper
• Crushed red pepper to taste
• 1 lime
• 1 (28 ounce) can tomatillos
• 2 fresh jalapeno peppers, seeded
• 4 tablespoons canola oil, divided
• 1 (10.5 ounce) can beef broth
• 12 (6 inch) corn tortillas
• 1/2 large onion, chopped
• 2 tomatoes, chopped
• 1 avocado - peeled, pitted and sliced
• 1 bunch fresh cilantro, chopped
• 1 lemon

Step by Step:

• Place sliced meat into a shallow bowl, and season with salt, black pepper, and crushed red pepper. Squeeze the lime juice over the meat, and turn until evenly coated. Cover, and refrigerate for 30 minutes.
• In a blender or food processor, combine tomatillo and jalapeno. Puree for 15 to 20 seconds, or until thick. Heat 1 tablespoon oil in a large skillet over medium high heat. Carefully pour in tomatillo mixture. Cook, stirring frequently, for 5 minutes. Stir in beef broth. Reduce heat, and simmer for 20 to 30 minutes, or until mixture coats a spoon. Transfer mixture to a serving dish.
• Heat tablespoon oil in a large skillet over high heat. Stir in 1/3 of the beef, and saute for 1 minute. Transfer to serving dish. Repeat with remaining beef. Meanwhile, heat tortillas in the oven or microwave, according to package instructions.
• To serve, place two tortillas on top of each other. Add desired amount of meat, spoon over some tomatillo mixture. Top with onions, tomatoes, avocado and cilantro. Garnish with a wedge of lemon, to be squeezed over taco before eating
  
  Yield: 6 servings