01 - Heat 1 tablespoon oil in a large skillet over medium-high heat. Add diced potatoes and season with salt, pepper, and garlic powder. Cook, stirring frequently, until golden and crisp, approximately 12–15 minutes. Remove from skillet and set aside.
02 - In a mixing bowl, combine shredded cabbage, grated carrot, green onions, parsley, mayonnaise, Dijon mustard, apple cider vinegar, salt, and pepper. Toss thoroughly until evenly coated. Set aside to allow flavors to meld.
03 - Add remaining oil to the skillet and heat over medium heat. Add shredded corned beef and sauté for 2–3 minutes until heated through and slightly crisped at edges.
04 - Warm tortillas in a dry skillet over medium heat for 30 seconds per side or microwave in batches until soft and pliable.
05 - Layer each tortilla with a portion of crispy potatoes, followed by warm corned beef. Top generously with cabbage slaw and finish with a drizzle of sour cream.
06 - Serve immediately while tortillas are warm and potatoes remain crisp. Offer extra slaw on the side if desired.