Preheat your oven to 400°F and line a rimmed baking sheet with parchment paper.
Dice the chicken breast into 1-inch cubes and place them in a large mixing bowl.
Drain and rinse the chickpeas, then use a clean kitchen towel to pat them completely dry to ensure a crisp texture.
Add the chickpeas and broccoli florets to the bowl with the chicken.
In a small jar, whisk together the avocado oil, lemon juice, lemon zest, minced garlic, oregano, sea salt, and black pepper.
Pour the dressing over the chicken and vegetables, tossing thoroughly to ensure every piece is well-coated.
Spread the mixture in a single layer on the baking sheet and roast for 20 minutes, or until the chicken is golden and the chickpeas are toasted.