Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Slice the chicken breast into 1-inch cubes and chop the zucchini, red bell pepper, and red onion into similar bite-sized pieces.
Place the chicken and vegetables on the baking sheet, drizzle with olive oil, and season with sea salt, black pepper, and dried oregano.
Toss everything together until evenly coated, then spread into a single layer.
Roast in the oven for 18 to 20 minutes, or until the chicken is cooked through and the vegetables are tender with slightly charred edges.
While the chicken and vegetables roast, spread the hummus onto the center of a large plate or shallow bowl using the back of a spoon to create a well.
Pile the roasted chicken and vegetable mixture over the hummus.
Finish the platter by sprinkling with crumbled feta cheese and a fresh drizzle of lemon juice before serving.