Preheat oven to 425°F. Lightly spray rimmed sheet pan (18 by 13 inches) with cooking spray.
Place broccoli on pan and drizzle with 1 tablespoon olive oil. Sprinkle with salt and pepper, toss until broccoli is coated with oil. Arrange broccoli in a single layer on one side of the sheet pan.
3 ½ cups broccoli florets, 1 tablespoon extra virgin olive oil, ⅛ teaspoon kosher salt, ⅛ teaspoon ground black pepper
Place chicken on a cutting board and top with wax paper or plastic wrap. Using a meat mallet or a rolling pin, flatten chicken to about ½ inch. Try to make it a consistent thickness so that the chicken cooks evenly. If desired, you can cut each one in half to make 6 servings.
3 boneless skinless chicken breasts
Prepare three shallow bowls for breading the chicken. In the first, place flour, salt, pepper, garlic powder. Stir to combine. In the second bowl, lightly beat the egg. In the third bowl, mix together panko bread crumbs, Parmesan cheese, and oregano.
½ cup all purpose flour , ¼ teaspoon kosher salt, ¼ teaspoon ground black pepper, ¼ teaspoon garlic powder, 1 large egg, ½ cup panko breadcrumbs, ½ cup grated Parmesan cheese, 1 teaspoon dried oregano
Take one chicken cutlet and coat it in flour mixture, then dip in egg mixture. Let excess drip off and then dip it in panko and Parmesan mixture, pressing lightly so it adheres. Place on baking sheet. Repeat with remaining chicken.
Bake for 15 minutes, remove pan from oven and stir broccoli so it browns evenly. Bake for 10 minutes more.
⅔ cup marinara sauce, ½ cup shredded mozzarella cheese
Remove the pan from oven and add marinara sauce and mozzarella cheese to the top of each chicken breast. Return to oven for 5 minutes or until cheese is melted and sauce is hot.
Notes
Use chicken cutlets: If you prefer, buy chicken cutlets and omit step 2. Chicken cutlets are already trimmed and flattened, ready to use.
Try a different vegetable: Other vegetables can be substituted for the broccoli. Sliced zucchini or summer squash, green beans, carrots, or eggplant are good choices.