Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Drain and rinse the chickpeas, then pat them very dry with a clean kitchen towel or paper towels to ensure maximum crispiness.
Slice the chicken breast into bite-sized pieces and place them on the baking sheet along with the dried chickpeas.
Drizzle the chicken and chickpeas with 0.5 tbsp of olive oil, then sprinkle with oregano, sea salt, and black pepper, tossing well to coat evenly.
Roast in the oven for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden and crunchy.
While roasting, place the chopped kale in a large serving bowl and massage it with the remaining 0.5 tbsp of olive oil and lemon juice until the leaves are tender.
Assemble the bowl by topping the massaged kale with the roasted chicken, crispy chickpeas, cherry tomatoes, and diced cucumber.
Garnish the entire bowl with fresh lemon zest and an extra crack of black pepper before serving.