PREHEAT oven to 325° F. Grease 12-inch pizza pan or large baking sheet.
PLACE whole bar of dough on prepared pan. Allow to soften for 5 to 10 minutes. Using fingertips, pat dough gently to form a 9-inch circle.
BAKE for 22 to 25 minutes or until light golden brown. Remove from oven; prick with fork. Cool on pan on wire rack.
BEAT pumpkin, cream cheese, 2 tablespoons sugar and cinnamon in small mixer bowl until smooth. Spread over pizza crust to 3/4 inch from edge. Mix apple slices with remaining sugar and dash cinnamon in small bowl; place on pizza. Sprinkle with nuts.
BAKE for 8 to 10 minutes; remove from oven. Drizzle with caramel topping. Cut into wedges; serve warm.