Turkey Shepherds Pie

Name: Turkey Shepherd's Pie
Ingredients: 1 1/2 lb. potatoes, peeled; Kosher Salt; 4 tbsp. melted butter; 1/4 c. milk; 1/4 c. sour cream; Freshly ground black pepper; 1 1/4 c. shredded Monterey Jack, divided; 1 tbsp. extra-virigin olive oil; 1 large onion, chopped; 2 carrots, peeled and chopped; 2 small parsnips, peeled and chopped; 2 cloves garlic, minced; 1 tsp. fresh thyme; 1 tsp. fresh sage, minced; 3/4 c. dry white wine; 1 1/2 lb. ground turkey; 3 tbsp. all-purpose flour; 3/4 c. low-sodium turkey or chicken broth; 1 tbsp. freshly chopped parsley, for garnish