Start by cutting the chicken breasts into dices and set aside.
Into a skillet, add a drizzle of olive oil and the onion chopped into dices, stir until golden brown then turn off the heat.
Into a bowl, add the diced chicken, the golden-brown onions, the salt, the garlic powder, the oregano, the sweet paprika and the black pepper, mix all the ingredients very well.
Into another bowl, add the eggs, the cheese, the table cream, season with salt, mix well.
Now into a baking dish, add a drizzle of oil and spread it out very well.
Add all the seasoned chicken and spread it out evenly all over the baking dish.
Cover the chicken with the egg mixture.
Add the slices of tomato all over the mixture.
Take it to a preheated oven at 180°C (356°F) and let it bake for 35 minutes
Serve.