Make the marinade: in a bowl, combine soy sauce, vegetable orange juice, lime juice, minced garlic, chili powder, cumin powder, oregano, and a pinch of salt. Stir well and set aside.
Cut the meat: cut the skirt steak into ½-inch pieces.
Marinate the meat: Add the meat to the marinade, cover tightly with plastic wrap, and refrigerate for at least 1 hour or overnight.
Cook the meat:
Heat the oil: heat vegetable oil over medium-high heat in a skillet.
Cook the meat: Add the marinated meat and marinade to the skillet. Cook for 6-7 minutes, stirring occasionally, until the meat is browned and the marinade reduces to a thick sauce. There will be just a bit of it left.
Assemble the tacos:
Warm tortillas
Heat tortillas: heat a large skillet over medium-high heat. Add the tortilla to the skillet (no oil is needed) and warm it for 20-30 seconds per side. Repeat with the remaining tortillas.
Assemble the tacos: serve the cooked steak on warm tortillas, topped with diced onion, chopped fresh cilantro, and lime wedges on the side.
Notes
Carne asada is typically made with flank steak, but top round or skirt steak are also great options.
Ensure all meat pieces are similar in size for even cooking.
The longer you marinate the meat, the more tender and flavorful it will become.