Basque-Style Sweet Potato Cheesecake

Name: Basque-Style Sweet Potato Cheesecake
Cuisine: European, Spanish, Mediterranean
Ingredients: 2 lb. sweet potatoes (3–4 large), preferably garnet, scrubbed; Unsalted butter (for pan); 24 oz. cream cheese (not low-fat), room temperature; 1 cup (200 g) granulated sugar; ¼ cup (50 g) light brown sugar; 3 large eggs; ½ cup sour cream (not low-fat), room temperature; ½ cup heavy cream, room temperature; 1 tsp. Diamond Crystal or ½ tsp. Morton kosher salt; 1 vanilla bean, split lengthwise, or 2 tsp. vanilla extract; ¼ cup (31 g) all-purpose flour; ½ tsp. ground cinnamon; ¼ tsp. ground ginger; ¼ tsp. ground nutmeg; A 9"-diameter springform pan