Preheat your oven to 400 degrees f.
Season the chicken breasts with sea salt, pepper, Italian seasoning, garlic powder, and cayenne pepper, then drizzle with the oil.
Gently rub the seasonings into the chicken on all sides to coat well, then arrange them evenly into a baking dish.
Bake for 15 minutes in your preheated oven, then remove from the oven.
Spoon the marinara sauce all over the chicken, then sprinkle with cheese, mini pepperoni, olives and cherry tomatoes as shown.
Return the baking dish to the oven and bake until chicken is fully cooked (internal temp should read 165F), about 10 additional minutes.
Sprinkle with fresh chopped herbs and enjoy!