Preheat oven to 425. Spread squash in single layer on a lightly oiled baking sheet. Bake 10-15 minutes until fork tender (alternatively, squash can be steamed until fork tender instead of roasted). Saute onion, garlic, ginger, and cayenne with canola oil until tender. Toss cooked squash into pan with onions. Add spinach until wilted. Top with a handful of toasted pine nuts.