Shepherd's Pie Potato Skins

Name: Shepherd's Pie Potato Skins
Prep time: 20 min
Total time: 20 min
Cuisine: American
Ingredients: 4 medium Russet potatoes (2 3/4 to 3 lb.), scrubbed; 2 tbsp. neutral oil, divided; 1 lb. lean ground beef; Kosher salt; Freshly ground black pepper; 1/2 medium yellow onion, finely chopped; 1 medium carrot, peeled, finely chopped; 2 cloves garlic, finely chopped; 1 tsp. chopped fresh rosemary; 1 tsp. chopped fresh thyme; 2 tbsp. tomato paste; 1/4 c. dry red wine, such as Cabernet Sauvignon; 1/2 c. low-sodium beef broth; 2 tbsp. Worcestershire sauce; 2 tbsp. all-purpose flour; 1/2 c. frozen corn; 1/2 c. frozen peas; 1/2 c. half-and-half; 4 tbsp. unsalted butter; 1/4 c. shredded Parmesan, divided; 2 tbsp. chopped fresh parsley, divided