To prepare compote: Combine plums, cider, 1/4 cup sugar (or Splenda) and cinnamon in a medium saucepan; bring to a simmer over medium heat. Cook, stirring occasionally, until the plums are soft and falling apart, about 5 minutes. Remove from the heat. Peel and grate apples. Stir the grated apples into the plums. Spoon the compote into a large bowl and chill in the refrigerator.

To prepare custard: Heat 1 cup milk in a saucepan over medium heat until steaming; do not boil. Mix 1/4 cup sugar (or Splenda), cornstarch and salt in a medium bowl. Add eggs and whisk until smooth. Whisk in the remaining 1/2 cup cold milk. Add the heated milk to the egg mixture, whisking constantly. Return the mixture to the saucepan. Cook over low heat, whisking constantly, until thickened, about 3 minutes. Remove from the heat and whisk in vanilla. Transfer the custard to a clean bowl and let cool slightly or refrigerate until chilled.

To serve, spoon custard into dessert dishes and top each with compote.

Ingredient Note: In the EatingWell Test Kitchen, sucralose is the only alternative sweetener we test with when we feel the option is appropriate. For nonbaking recipes, we use Splenda Granular (boxed, not in a packet). For baking, we use Splenda Sugar Blend for Baking, a mix of sugar and sucralose. It can be substituted in recipes (1/2 cup of the blend for each 1 cup of sugar) to reduce sugar calories by half while maintaining some of the baking properties of sugar. If you make a similar blend with half sugar and half Splenda Granular, substitute this homemade mixture cup for cup.

When choosing any low- or no-calorie sweetener, be sure to check the label to make sure it is suitable for your intended use.

MAKE AHEAD TIP: Refrigerate compote and custard in separate containers for up to 2 days.