In a small bowl, mix olive oil, chili powder, garlic powder, cumin, salt, and pepper. Rub this mixture all over the flank steak and let it marinate for at least 30 minutes.
Preheat a grill or grill pan over medium-high heat. Grill the flank steak for about 5-7 minutes on each side or until it reaches your desired doneness. Let it rest for 5 minutes before slicing thinly against the grain.
In a skillet over medium heat, add a dash of olive oil. Season the shrimp with salt and pepper, then sauté for about 3-4 minutes until they turn pink and opaque. Remove from heat.
In a dry skillet or directly on the grill, warm the corn tortillas for about 30 seconds on each side until they are soft and pliable.
On each tortilla, layer slices of flank steak, sautéed shrimp, avocado slices, and shredded cabbage. Top with fresh cilantro.
Squeeze lime juice over the assembled tacos and drizzle with sour cream if desired.
Notes
Feel free to add your favorite toppings.
Keyword avocado, shrimp, steak, surf and turf, tacos