Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Chop the zucchini, red bell pepper, and red onion into uniform, bite-sized chunks.
In a mixing bowl, toss the chopped vegetables with the olive oil, half of the dried oregano, sea salt, and black pepper.
Spread the vegetables in a single layer on the prepared baking sheet and roast for 18-20 minutes until tender and slightly caramelized.
While the vegetables roast, season the chicken breast with the remaining oregano, salt, and pepper, then grill or pan-sear over medium-high heat for 6-7 minutes per side until the internal temperature reaches 165°F.
Remove the chicken from the heat and let it rest for 3 minutes before slicing it into thin strips.
Spread the hummus onto a large plate or shallow bowl, using the back of a spoon to create a well in the center.
Arrange the warm roasted vegetables and sliced chicken on top of the hummus bed.
Garnish the platter with crumbled feta cheese and a bright squeeze of fresh lemon juice before serving.