If it is autumn or winter, buy one butternut squash, or any combination of carrots, parsnips, celery root, and turnips. Simply roasted, these are one of the great pleasures in life. I grew up eating them hot at dinner, turned into salads at lunch, and cold as an after-school snack. There’s nothing wrong with a snack of granola, but there is something unarguably right with one of roasted vegetables.