Preheat oven to 375°. Bake the squash for about 1 hour. Allow it to cool, then cut open, remove seeds, and scoop out the flesh.
Grind the cumin and cardamom (if using seeds).
Saute the onion in olive oil for 2-3 minutes, then add ginger, garlic, cumin, cardamom, and continue cooking for another 1-2 minutes. Add the apple and 4 cups of hot water, along with the squash. Cook for 10 minutes or so.
When the apple is soft, puree with an immersion blender (if you don’t have an immersion blender, you can eat as a stew or blend in a blender once it cools a little bit.)
Season with lemon juice and salt. Add more spices as desired. Serve in your favorite bowls and eat in a cozy spot!