Steps
1. Preheat the oven to 375°F (190°C).
2. Cook the chicken breast until fully done and shred it.
3. Dice the onions and tomatoes.
4. Cut the bread into cubes.
5. In a baking dish, layer the bread cubes, shredded chicken, onions, tomatoes, and shredded cheese.
6. Repeat the layers until all ingredients are used.
7. Bake in the preheated oven for 20-25 minutes or until the cheese is bubbly and golden.
8. Serve hot and enjoy!