Combine the brown sugar, butter, and corn syrup in a small saucepan and cook over medium heat until thickened, stirring constantly. Pour into a 13x9-inch baking dish and sprinkle half the pecans over the syrup. Place 6 to 9 slices of bread on top of the syrup mixture and sprinkle the remaining pecans on top of the bread. Place apples on top of pecans and bread. Top with the remaining 6 to 9 slices of bread.
Combine the eggs, milk, vanilla, nutmeg, cinnamon, and salt in a blender. Pour evenly over the bread slices, cover the baking dish, and chill for 8 hours.
Bake uncovered in a preheated 350 degree oven until lightly browned, for 40 to 45 minutes. Drizzle sauce over toast before serving.
Graycote Inn Caramel Sauce
In a small saucepan, combine the brown sugar, butter, and corn syrup and cook until thickened, stirring constantly.