In a bowl, add chicken marinade ingredients, whisk, until fully combined.
Add Chicken thighs in the marinade and mix well, until fully coated. Set aside to marinate for 15 minutes.
In a large bowl, add cubed Sweet Potatoes, Peppers, Shallots, Grape tomatoes, salt, black pepper, and olive oil, mix well.
Using a baking sheet, add marinated vegetables, and spread evenly on the pan. Add marinated chicken in the centre of the pan surrounding the vegetables.
Place in oven, for 45 minutes, until chicken is cooked through, vegetables are caramelized, and sweet potatoes is soft. Mix once after 15 minutes.
Remove from heat, add Feta Cheese and parsley for garnish. Ready to serve.