Preheat oven to 425°F. Line a large baking sheet with parchment paper and set aside.
In a large bowl, combine chicken, sweet potatoes, red onion, garlic, 2 tablespoons olive oil, honey, paprika, cumin, red pepper flakes, oregano, turmeric, cinnamon, lemon juice, and salt and pepper. Toss well to evenly coat.
Spread the chicken mixture in an even layer on prepared baking sheet. Add the juiced lemons. Drizzle with a little more olive oil if it looks dry, and sprinkle with sesame seeds.
Roast 30 to 40 minutes, stirring halfway through cooking. Cook until chicken reaches an internal temperature of 165°F and sweet potatoes are tender.
To serve, place the chicken and vegetables in individual bowls and top with arugula, cucumbers, feta, tzatziki, hummus, and herbs. If desired, drizzle more lemon juice and olive oil on top before serving. Enjoy with whole wheat pita or naan.