1. Place a small roasting pan in the oven. Preheat oven to 450°.
2. Carefully remove hot pan from oven. Melt fat in pan; add potatoes. Sprinkle potatoes with 1/4 teaspoon salt; toss. Bake at 450° for 45 minutes or until golden, turning once after 30 minutes.
3. Heat a large skillet over medium-high heat. Coat pan with cooking spray. Add sausage; cook 5 minutes or until browned, stirring to crumble. Combine butter and flour, stirring until smooth. Add butter mixture to sausage; cook 1 minute, stirring constantly. Slowly add broth to pan, stirring constantly; bring to a boil. Reduce heat; add remaining 1/4 teaspoon salt, and simmer 3 minutes or until slightly thick, stirring occasionally. Spoon gravy over fries; top with cheese curds. Sprinkle with parsley, if desired.