Ingredient:

• 1 ½ pounds boneless beef top sirloin, cut into thin bite-size slices
• ½ 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
• ½ large onion, chopped
• 2 tomatoes, chopped
• 1 avocado - peeled, pitted and sliced
• 1 bunch fresh cilantro, chopped
• 1 lemon