Steps
Preheat your oven to 375°F (190°C).
Season the chicken breast with salt, pepper, and garlic powder.
In a skillet, heat olive oil over medium heat and cook the chicken for about 5-6 minutes on each side, until golden brown and cooked through.
Remove the chicken from the skillet and let it cool slightly.
In a bowl, whisk the egg and mix in the spinach and diced tomato.
Place the cooked chicken in a baking dish and pour the spinach-tomato mixture over it.
Sprinkle cheese on top and bake for 15-20 minutes, until the cheese is melted and bubbly.
Let it cool for a few minutes before serving.