Preheat the oven to 425°F. Line a large rimmed baking sheet with parchment paper, or coat lightly with cooking spray.
Remove chicken from the fridge and from all of its packaging. Pat each piece dry with paper towels, then sprinkle lightly with kosher salt and set aside.
4-6 boneless, skinless chicken thighs, kosher salt
Peel and chop the sweet potato into small cubes—about half an inch square—and toss in a bowl with 1 Tablespoon olive oil and ½ teaspoon each chili powder, ground cumin, and kosher salt. Once the potatoes are evenly coated, spread them out in a single layer on the baking sheet, leaving space in between them. Place in the oven for 10-15 minutes while you prep the broccoli and chicken.
1 medium-large sweet potato, extra-virgin olive oil, 1 and 1/2 teaspoons chili powder, 1 and 1/2 teaspoons ground cumin
Add broccoli florets to the same bowl used for the sweet potatoes. Drizzle with 1 teaspoon olive oil and sprinkle with another ¼ teaspoon kosher salt. Toss to combine.
3-4 cups broccoli florets
In a small bowl, combine 3 teaspoons brown sugar; 1 teaspoon each chili powder, ground cumin, and paprika; ½ teaspoon each garlic and onion powder; and ¼ teaspoon each black pepper and chipotle chili powder, if using. Add 1-2 teaspoons olive oil and stir into a thick paste. Rub this into the chicken on all sides.
3 teaspoons brown sugar, 1 teaspoon paprika, 1/2 teaspoon onion powder, 1/2 teaspoon garlic powder, 1/4 teaspoon black pepper, 1/4 teaspoon chipotle chili powder
After the sweet potatoes have been in for about 15 minutes, remove the pan, toss the potato cubes, and add the broccoli florets in among them. Nestle the chicken in among the veggies.
Roast for 15-20 minutes more, until all the veggies are tender and the chicken is cooked through (165°F on an instant read thermometer).
While the chicken roasts, whisk together all of the sauce ingredients. Thin out with additional lime juice or water as desired.
1/3 cup sour cream or plain Greek yogurt, juice of 1/2 lime, 1/2 teaspoon chili powder, 1/4 teaspoon kosher salt, 1-2 teaspoons water
Serve chicken and veggies with extra lime wedges and drizzled with sauce, if desired. Enjoy!