If your motto is “eat the rainbow,” this Thanksgiving menu is for you. Yes, there’s turkey, but it’s really all about the vegetables. It begins with a brilliant roasted purple cabbage and pear salad. The two main dishes make the menu friendly to vegetarians and omnivores alike: a maple-brined turkey breast and a meatless vegetable tart. And the side dishes are what really give the plate a rainbow of color and flavor: brown-butter green beans with pine nuts, cinnamon mashed sweet potatoes, and lime-scented cranberry sauce. The menu ends with a pink cranberry-and-cream tart.