Creating Mexican Steak Torta Sandwiches is straightforward when you follow these simple steps:

1. Prepare the Marinade: In a bowl, mix olive oil, lime juice, Worcestershire sauce, chili powder, cumin, garlic powder, and onion powder. Season with salt and black pepper.
2. Marinate the Steak: Place the flank steak in the marinade, ensuring it’s well coated. Let it marinate for at least 30 minutes, preferably in the refrigerator.
3. Preheat the Grill: Heat your grill or stovetop griddle to medium-high heat.
4. Cook the Steak: Remove the steak from the marinade and place it on the grill. Cook for about 4-6 minutes per side, or until it reaches your desired doneness.
5. Rest the Steak: Once cooked, take the steak off the grill and let it rest for about 5 minutes before slicing.
6. Slice the Steak: Cut the steak against the grain into thin strips to ensure tenderness.
7. Toast the Rolls: Meanwhile, slice the bolillo rolls in half and lightly toast on the grill until golden brown.
8. Assemble the Sandwich: On the bottom half of each roll, layer the sliced steak, avocado, tomato, and lettuce. Drizzle crema or sour cream on top and add salsa.
9. Garnish: Top with fresh cilantro if desired, and place the top half of the roll over the fillings.
10. Serve and Enjoy: Your delicious Mexican Steak Torta Sandwich is ready to be enjoyed!