Preheat the oven to 400°F. Line a baking sheet with parchment.

Brush the cut sides of each squash half generously with melted butter and drizzle with honey. Sprinkle with Herbes de Provence, Kosher salt, and freshly ground black pepper.

Place the squash halves cut-side up and bake for about 30 minutes, until fork-tender and lightly caramelized around the edges.

Remove from the oven, sprinkle the grated Gruyère cheese into each squash cavity, and return to the oven for another 5 to 7 minutes — just until the cheese melts and turns slightly golden.

Spoon any buttery juices that collected in the center over the top. Sprinkle with fresh thyme, if using.