Melt margarine in a medium nonstick skillet over medium heat.
Add apple; saut 5 minutes. Stir in cranberry sauce; cook 2 minutes or until apple is tender, stirring occasionally.
Cut squash in half lengthwise, and discard seeds and membrane. Spoon 1/3 cup fruit filling into each squash half.
Microwave directions: Pierce squash with a fork, and arrange on paper towels in microwave oven. Microwave at HIGH 9 to 10 minutes or until tender. Prepare fruit fillings as directed above.