Heat the oven: Preheat to 425°F (220°C). Place a large rimmed baking sheet in the oven while it heats so it gets hot.
Prep the squash: Wash the delicata well. The skin stays on, so scrub any dirt from the ridges.
Trim the ends.
Slice and seed: Cut each squash lengthwise. Scoop out the seeds with a spoon. Slice into 1/2-inch half-moons so they roast evenly.
Season: In a large bowl, toss squash with olive oil, salt, and pepper.
If using spices or herbs, add them now. If using maple or honey, add 1 to 2 teaspoons and toss again.
Arrange on the hot pan: Carefully remove the baking sheet. Spread the squash in a single layer, with space between pieces.
Crowding leads to steaming, not browning.
Roast and flip: Roast for 12 to 15 minutes. Flip the slices and continue roasting 8 to 12 minutes, until tender with golden, caramelized edges.
Finish: Taste and adjust salt. For a glossy finish, drizzle a little melted butter or a squeeze of lemon.
Add toppings if you like—feta, parsley, or pumpkin seeds.
Serve: Serve hot as a side, or add to salads, grain bowls, tacos, or breakfast plates with eggs.