Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Drain and rinse the chickpeas, then pat them thoroughly dry with a clean kitchen towel to ensure they get crispy.
Cut the chicken breast into small, bite-sized cubes of roughly equal size.
In a medium bowl, combine the chickpeas, chicken cubes, olive oil, rosemary, thyme, garlic powder, salt, and pepper.
Toss the mixture until the chicken and chickpeas are evenly coated with the oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, ensuring there is space between the pieces.
Roast for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden.
Remove from the oven and sprinkle the hemp hearts over the top before serving warm.