Preheat oven to 160ºC (slow). Place oil in a deep, heavy pan or skillet with dome lid. Heat until oil is hot enough to pop a popcorn kernel. Pour popcorn into pan. Cover and reduce heat to medium. Shake pan over the burner until all corn is popped. Place popped corn in a shallow baking pan. Drizzle with melted fat. Mix. Sprinkle with cheese. Add salt, if desired. Mix. Heat 8 to 10 minutes in oven, stirring frequently. NOTE: A popcorn popper may be used to prepare popcorn. Follow manufacturer's directions. Calories per 1 cup serving: About 185