Roasted Squash with Yogurt and Spiced, Buttered Pistachios

1. Preheat the oven to 425°F
2. Remove the seeds from the squash if you want (I leave them in, as I enjoy their crunchy texture as they roast, but whatever you like!) and toss the squash on a rimmed baking sheet with the olive oil. Season with salt and pepper, and roast until the squash is totally tender and golden brown with caramelized bits, 40 to 50 minutes.
3. Meanwhile, melt the butter in a small pot over medium heat. Cook, swirling occasionally, until the butter has browned and started to foam, 3 to 5 minutes. Remove from the heat and add the pistachios, cumin, turmeric, cinnamon, and red pepper flakes, if using. Season with flaky salt and set aside.
4. Combine the yogurt and lemon juice in a small bowl and season with salt. Spoon the yogurt sauce onto the bottom of a large serving platter or bowl. Arrange squash nestled into each other and spoon the buttered pistachios over everything. Top with flaky salt and a grind of black pepper or a pinch of red pepper flakes.

Do Ahead

1. Squash can be roasted several hours ahead of time, wrapped loosely, and stored at room temperature. It doesn't need to be reheated before serving, but you can if you like.