01 - Heat 1 tablespoon vegetable oil in large skillet over medium-high heat. Add diced potatoes, season with salt, pepper, and garlic powder. Cook stirring occasionally until golden and crisp, approximately 12-15 minutes. Remove from skillet and set aside.
02 - In medium 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 - Heat remaining 1 tablespoon oil in the same skillet. Add shredded corned beef and sauté for 2-3 minutes until thoroughly heated through.
04 - Heat flour tortillas in dry skillet over medium heat for 30 seconds per side or microwave between damp paper towels for 20-30 seconds until soft and pliable.
05 - Layer crispy potatoes onto each warmed tortilla. Top with warmed corned beef and generous spoonful of cabbage slaw. Drizzle with sour cream.
06 - Serve immediately while warm. Offer extra slaw on the side if desired.