Mix the dry ingredients: In a mixing bowl, combine the ground Earl Grey tea, garlic powder, salt, and black pepper. Brown sugar is optional to add the subtle caramelized sweetness to the kebabs, balancing out the zesty notes of the Earl Grey.
Cube the chicken: Cut the chicken into bite-sized cubes, ensuring uniformity for even cooking.
Coat the chicken: Gently toss the chicken cubes in the Earl Grey rub, making sure each piece is thoroughly coated. Allow the chicken to marinate in the fridge for at least 30 minutes, allowing the flavors to meld together.
Preheat the grill: Ensure your grill is preheated to medium-high heat, and lightly oil the grates to prevent sticking.
Thread the kebabs: Thread the marinated chicken cubes along with your favourite vegetables onto pre-soaked wooden or metal skewers, leaving a little space between each piece for even cooking.
Grill the kebabs: Place the kebabs on the preheated grill and cook for about 12-15 minutes, turning occasionally, until the chicken is cooked through and slightly charred on the edges.