Drain the Pineapple Chunks, reserving 1 cup of juice, and pulse the Cranberries in a food processor until finely chopped.
Heat the reserved pineapple juice until steaming, remove it from the heat, whisk in the Strawberry Gelatin, and cool for about 10 minutes.
Combine the Cranberries and Pineapple Chunks in a large bowl, pour over the cooled gelatin mixture, and stir gently.
Fold in the Mini Marshmallows and Whipped Topping, then fold in the Pecans.
Cover and refrigerate for at least 4 hours, until cold and softly set.
Serve chilled and refrigerate leftovers within 2 hours.