Cottage Pie Potato Galette

Name: Cottage Pie Potato Galette
Ingredients: 1½ lbs ground beef (, may substitute ground turkey or sausage); 2 tsp kosher salt (, or more to taste); 1 tsp black pepper (, or more to taste); 1 cup dry red wine; 1¼ tbsp tomato paste; 4 tbsp unsalted butter; 1½ cups chopped onion; 1 cup chopped carrots (, peeled, chopped into ½-inch cubes); 1 cup chopped butternut squash (, peeled, chopped into ½-inch cubes); 5 cloves fresh garlic (, minced); 3 tbsp flour; 2 cups beef broth; 1 tbsp Worcestershire sauce; 1 tbsp chopped fresh rosemary; 1 tsp chopped fresh thyme; 1½ tsp kosher salt (, or more to taste); ¾ cup peas (, fresh or frozen); 2 large sweet potatoes (about 1½ lbs) (, peeled and very thinly sliced); 2 large Yukon gold potatoes (about 1½ lbs) (, peeled and very thinly sliced); 2 tbsp unsalted melted butter (, or substitute non-stick cooking spray); 2 tbsp dried or fresh parsley