Wash the tomatoes and cut into ½ cm thick slices. Place roof tiles in a baking dish. Cut the onion and garlic cloves into thin slices and place on the tomatoes, season with salt, pepper and drizzle with olive oil. Salt and pepper the chicken breast fillets all around and place on top of the vegetables.
Coarsely crumble the corn flakes. Add oregano, parsley and paprika powder and mix everything with the melted butter. Spread the mixture over the meat. Bake at 200 degrees (convection 180 degrees) on the middle rack for 30-35 minutes.