01 - Heat 1 tablespoon vegetable oil in a large skillet over medium-high heat. Add diced potatoes and season with half the 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, and apple cider vinegar. Season with remaining salt and pepper. Toss thoroughly until all vegetables are evenly coated. Set aside to allow flavors to meld.
03 - Heat remaining tablespoon of oil in the same skillet. Add shredded corned beef and sauté for 2-3 minutes until heated through and slightly crisped at edges.
04 - Heat flour tortillas in a dry skillet over medium heat for 30 seconds per side or microwave between damp paper towels for 20-30 seconds until warm and pliable.
05 - Layer each tortilla with crispy potatoes, followed by warm corned beef. Top with a generous portion of cabbage slaw. Finish with a drizzle of sour cream across the top.
06 - Serve immediately while tortillas are warm and potatoes remain crisp. Offer extra slaw on the side for guests who prefer additional crunch.