Pat the chicken breast dry with a paper towel and cut into bite-sized cubes.
Season the chicken cubes evenly with the dried oregano, sea salt, and black pepper.
Heat the olive oil in a large skillet over medium-high heat until it begins to shimmer.
Add the chicken to the skillet in a single layer and sear until golden brown and cooked through, about 5 to 7 minutes.
Remove the cooked chicken from the skillet and set it aside on a clean plate.
In the same skillet, add the broccoli florets, chopped bell pepper, and chickpeas, cooking for 5 minutes until the vegetables are tender and slightly charred.
Add the minced garlic to the vegetables and sauté for 1 minute until fragrant.
Return the chicken to the skillet, drizzle with the fresh lemon juice, and toss everything together until well combined and heated through before serving.