Preheat oven to 350°F. Butter an 11” x 7” baking dish.
In a large bowl, combine cranberries, Splenda Granulated Sweetener, and orange zest; let stand 15 minutes, stirring occasionally. Add mangoes; stir gently. Spoon the mixture into the prepared baking dish.
In a bowl, combine flour, Splenda Brown Sugar Blend, oats, cinnamon, and nutmeg. Cut butter into flour mixture with a pastry blender or two knives until crumbly. Stir in pecans. Spoon topping mixture over fruit filling.
Bake for 30–35 minutes or until topping is browned. Serve warm with a scoop of ice cream, if desired.