Preheat oven to 400°. Cut squash lengthwise in half; remove and discard seeds. Sprinkle with 1/2 teaspoon cumin. Place squash in a 15x10x1-in. baking pan, cut sides down. Bake until easily pierced with a fork, 35-45 minutes., In a large skillet, cook bacon over medium heat until crisp, stirring occasionally. Remove with a slotted spoon; drain on paper towels. Discard drippings., Add green onions, 2 tablespoons butter, garlic and pepper flakes; cook and stir over medium heat until tender, 2-3 minutes. Stir in apples, cider, syrup, salt, pepper and remaining cumin. Bring to a boil; cook until slightly thickened, 4-6 minutes., When squash is cool enough to handle, use a fork to separate strands. Add squash to skillet; cook until liquid is absorbed, 2-3 minutes. Stir in bacon, walnuts and parsley.