Preheat your oven to 400°F (200°C) to achieve golden caramelization on the chicken and veggies.
In a mixing bowl, combine 2 tablespoons of olive oil, 2 tablespoons of lemon juice, 2 tablespoons of honey, 1 teaspoon of lemon pepper seasoning, 1 teaspoon of kosher salt, and ½ teaspoon of black pepper. Stir until well mixed.
Add the bite-sized chicken pieces to the marinade and toss to coat thoroughly. Let it sit while you prepare the vegetables.
On a separate sheet pan, spread out the broccoli florets, diced bell pepper, and sliced red onion. Drizzle with 1 tablespoon of olive oil and sprinkle with 1 to 2 teaspoons of lemon pepper seasoning. Toss to ensure the veggies are evenly coated.
Once the chicken is well marinated, spread it evenly over the vegetable mixture on the sheet pan. Bake in the preheated oven for 20-25 minutes or until the chicken is cooked through and the vegetables are tender.
Allow the dish to cool slightly before serving. You can serve it straight from the sheet pan or plate it for a more polished presentation.