Preheat the oven to 425 degrees F (220 degrees C).
STEP 2
Spread 1/2 of the crushed tomatoes in a baking dish. Add 1/4 teaspoon salt, 1/2 teaspoon garlic powder, 1/2 teaspoon onion powder, and 1/2 teaspoon Italian seasoning; stir to combine.
STEP 3
Lay chicken on top and season with the remaining salt and black pepper.
STEP 4
Cover chicken with remaining tomatoes, then drizzle with balsamic vinegar. Sprinkle remaining spices and cover with cheese.
STEP 5
Top with pepperoni, olives, and bell pepper.
STEP 6
Bake about 20 minutes until cheese is melted and chicken is cooked to 165 degrees F (74 degrees C).