Slice the squash neck into 1/2-inch thick wheels (a medium-sized squash will yield 10-14 wheels). Cut the wheels into any shape that pleases you. (Keep the wheels whole if serving as a starter course. Cut into smaller bites for hors d’oeuvres.) Place on an oiled baking sheet or Silpat. Brush with olive oil and sprinkle with sea salt. Bake for about 25-30 minutes, until softened but not mushy.
While the squash is baking, thin the pesto with 1 tablespoon of olive oil. Spoon the pesto on the warm squash, sprinkle with pine nuts, and serve. (The squash can be roasted ahead of time and reheated just before serving.)