This side served with a mint-yogurt dressing goes well with roasted pork, lamb, or chicken.
Preheat oven to 375 degrees. On a rimmed baking sheet, toss acorn squash and onion with oliveoil; season with coarse salt and ground pepper. Roast until squash is tender, 30 to 35 minutes.
In a small bowl, combine Greek yogurt and lemon juice; season with salt and pepper. Transfer squash and onion to a serving plate. Top with yogurt, mint leaves, and ground pepper.