Preheat oven to 400°F (200°C).
Dice chicken breast, bell peppers, and zucchini into bite-sized pieces.
Toss chicken and vegetables with olive oil, dried oregano, sea salt, and black pepper on a parchment-lined baking sheet.
Roast for 18-20 minutes until the chicken is cooked through and the vegetables are tender-crisp.
While roasting, slice the cucumber and halve the cherry tomatoes.
Spread the hummus in a wide circle on a large plate or shallow bowl.
Top the hummus with the roasted chicken and vegetables.
Add the fresh cucumber, tomatoes, and olives.
Garnish with crumbled feta cheese and a squeeze of fresh lemon juice before serving.