01 -
Get your oven heating to 400°F. If your turkey breast has string tied around it, remove it first. Use paper towels to thoroughly pat the meat dry on all sides. Sprinkle the turkey evenly with 1½ teaspoons of salt and the black pepper, then massage the grated garlic all over the surface.
02 -
Grab a small bowl and mix together the mayo and za'atar until well combined. Scoop out 2 tablespoons of this mixture into another small bowl and use a brush to coat the turkey breast generously with it. Keep the leftover za'atar mayo in its bowl for later. Let the turkey hang out at room temperature for about 15 minutes while you get the veggies ready.
03 -
In a large mixing bowl, toss the sweet potato wedges with 1 tablespoon of olive oil, maple syrup, ¼ teaspoon salt, and the crushed red pepper flakes until everything's nicely coated.
04 -
Place your seasoned turkey breast on a rimmed baking sheet. Arrange the sweet potato wedges in a single layer around the turkey, making sure they're not overlapping. Slide the pan into the oven and roast for 20 minutes.
05 -
While that's roasting, use the same bowl (don't worry about washing it) to toss the brussels sprouts with the remaining 2 tablespoons of olive oil, cumin seeds, and ¼ teaspoon of salt. After the 20 minutes are up, give the sweet potatoes a quick toss and push them to one side of the pan. Add the brussels sprouts to the empty space and return the pan to the oven.
06 -
Continue roasting everything together until the vegetables are golden and caramelized and an instant-read thermometer stuck into the thickest part of the turkey reads 145°F. This should take another 20 to 30 minutes, bringing your total turkey cooking time to 40 to 50 minutes.
07 -
Take the pan out and let the turkey rest for 10 minutes before slicing—this keeps it juicy. While it's resting, take that reserved za'atar mayo and adjust the seasoning to your liking, adding a drizzle more oil, a pinch of salt, or a squeeze of fresh lemon juice as needed. Remove and discard the turkey skin if you want to cut calories, then slice the meat. Serve everything together with the za'atar mayo on the side for drizzling.