Heat walnuts in a large non stick skillet over medium low heat, stirring often, 4-5 minutes or until toasted and fragrant.

Remove from skillet and set aside.

Preheat broiler. Stir together brown sugar and cinnamon.

Place pineapple slices on a jelly roll pan.

Drizzle pineapple with butter and then sprinkle with brown sugar mixture.

Broil 4-5 minutes or until sugar melts.

Arrange pineapple on a platter and sprinkle with roasted walnuts.

Drizzle with any juices.

Serve each slice with one scoop of ice cream.