Oven: Preheat oven to 350F

Pierce squash in several places with a fork and place in a rimmed baking pan

Bake, uncovered until shell gives when pressed, about 1-1/4 to 1-1/2 hours

Cut baked squash in half; scrape out and discard seeds. Microwave: Cut squash in half lengthwise and scrape out and discard seeds

Place halves, open side up, in a 9 x 13-inch microwave dish

Cover with plastic food wrap

Cook on highest setting for 15 to 20 minutes, or until tender

Let stand, cov- ered, for an additional 5 minutes. Loosen squash strands with a fork and scoop out into a warm serving bowl

Add the pesto and mix lightly, using 2 forks

Pass with Parmesan cheese

Serves 4 to 6.