Heat oven to 450. Lightly spray a lg rimmed baking sheet w/ cooking spray. In lg bowl, combine 1 tbsp hot pepper sauce, 1 tbsp melted butter and seasoned salt.
Add potatoes to bowl and toss to coat. Add potatoes to baking sheet in single layer. Roast, turning once for 40 mins.
Remove from oven and toss w/ remaining hot pepper sauce and butter. In small saucepan, stir together blue cheese, sour cream, mayonnaise and pepper. Heat over meddium heat,, Stirring for 3 mins. Serve sauce w/ potatoes.