Rinse the acorn squash under lukewarm water and pat dry with a clean kitchen towel.
Place the squash on a flat surface, and use a sharp kitchen knife to make a small incision in the center of the squash.
Place the entire squash in the microwave for 3 to 4 minutes.
Use a kitchen towel to remove the squash from the microwave and place it onto a flat surface. Hold the end of the squash by the stem, and slice vertically, working away from your hand.
Place squash halves, open-faced, into a microwave-safe baking dish or plate. Microwave on HIGH for 6 minutes or until the squash is fork-tender.
Once the squash is cooked, allow it to cool for 2 minutes before removing it from the microwave. Use a large spoon to scoop out the seeds and discard them.