Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into one-inch cubes and chop the red bell pepper and zucchini into similar bite-sized pieces.
Rinse and drain the chickpeas, then spread them onto a clean kitchen towel and pat them thoroughly dry to ensure they roast properly.
Place the chicken, chickpeas, peppers, and zucchini onto the prepared baking sheet.
Drizzle the extra virgin olive oil over the mixture and sprinkle with sea salt, black pepper, dried oregano, and garlic powder.
Toss everything with your hands or a spatula until every piece is evenly coated in oil and spices.
Spread the ingredients into a single layer, ensuring they aren't overcrowded so they roast rather than steam.
Bake for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are slightly golden.
Remove from the oven and immediately drizzle with fresh lemon juice to brighten the flavors before serving.