Preheat oven to 400 F. Prepare two baking sheets with a silicon liner or parchment paper.

In large bowl, whisk together sesame oil, maple syrup, tamari, ginger, and red pepper flakes and set aside.

Wash squash thoroughly. Using large knife, split squash in half, and then into quarters. Cut each quarter into 1inch slices. Dip a slice of squash into marinade, turn to coat both sides, and lay it on lined baking sheet. Repeat with remaining slices, and reserve remaining marinade. Sprinkle squash with half the sesame seeds. Roast squash in preheated oven for 15 minutes; remove from oven and turn pieces to the other side. Sprinkle with remaining sesame seeds and return to oven for another 15 minutes.

Remove squash to serving platter and drizzle remaining marinade overtop, being sure to include all the ginger and red pepper flakes.