Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Pat the chicken breast dry with paper towels and cut it into small, uniform bite-sized cubes.
Rinse and drain the chickpeas, then pat them very dry with a towel to ensure they get maximum crispiness in the oven.
In a large mixing bowl, combine the chicken cubes, chickpeas, and broccoli florets.
Drizzle the olive oil over the mixture and sprinkle with the dried dill, garlic powder, onion powder, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated in the ranch-style seasoning.
Spread the mixture in a single layer on the prepared baking sheet, ensuring enough space between pieces for roasting rather than steaming.
Roast for 20 to 25 minutes, tossing the ingredients halfway through, until the chicken is cooked and the chickpeas are golden.
During the final 5 minutes of roasting, scatter the slivered almonds onto the tray to let them become fragrant and toasted.
Remove from the oven and let the mix rest for 2 minutes before serving warm in a bowl for a crunchy, high-protein meal.