Preheat your oven to 200°C (390°F). Line a baking sheet with parchment paper for easy cleanup.
Peel the butternut squash carefully with a vegetable peeler until smooth and free of skin.
Slice the squash in half, then scoop out the seeds and stringy bits. Cut the flesh into roughly 2-inch cubes for even roasting.
In a large bowl, toss the cubes with olive oil, salt, and a pinch of cinnamon if using, until evenly coated. Squeeze in the lemon juice and toss again.
Arrange the coated squash pieces on the prepared baking sheet in a single layer, keeping them spaced out for even roasting.
Roast in the oven for 25-30 minutes until the edges are golden brown and caramelized, shaking the pan halfway through to promote even browning.
While the squash roasts, whisk together honey and apple cider vinegar in a small bowl to create a quick glaze.
Once the squash is tender and edges are crispy, remove from the oven and brush generously with the honey-vinegar glaze. Return to the oven for an additional 5 minutes to set the glaze.
Remove from the oven and let rest for a few minutes. Drizzle with extra lemon juice if desired and sprinkle with fresh herbs or additional salt to taste.