MIX 2 pkg (4-serving size each) Jell-O Raspberry Jelly Powder and 4 cups water in a large saucepan. Bring to a boil on medium-high heat, stirring frequently until jelly powder is completely dissolved.

ADD 4 firm ripe peeled pears, such as Bosc, Bartlett or D'Anjou; partially cover saucepan with lid. Reduce heat to medium-low; simmer 20 min. or just until pears are tender, stirring gently every 10 min. Remove pears from liquid; discard liquid.

SERVE pears warm or cover and refrigerate at least 1 hour to overnight. Top each pear with 2 Tbsp. thawed Cool Whip Topping, if desired.