Heat a grill to medium heat. Lightly oil the grill.
Arrange the pineapple slices on a baking sheet and lightly spray both sides with olive oil spray.
Grill the pineapple until grill marks appear and the pineapple is starting to soften, about 2 minutes per side.
Place one pineapple slice on each plate and top each with ½ cup frozen yogurt, 2 teaspoons sauce and 2 teaspoons chopped pecans.
The sauce:
Melt the butter in a medium saucepan set over medium heat.
Whisk in the cornstarch until incorporated with the butter. Whisk for 30 seconds.
Slowly add in the maple syrup, rum, nutmeg and cinnamon.
Simmer the mixture, whisking constantly, until it thickens slightly, about 2 minutes.
Notes
*Nutritional information and WW points do not include the frozen yogurt, which makes it easier to calculate the nutritional values of the entire dessert if you use an alternative to frozen yogurt. Alternatives could include regular ice cream, soy ice cream, coconut milk-based ice cream and others.Weight Watchers Points: 3 (Blue - Freestyle SmartPoints), 3 (Green), 3 (Purple)