- Preheat the oven to 400°F (200°C).
- In a bowl, mix balsamic vinegar, olive oil, garlic, salt, and pepper.
- Place chicken breasts in a baking dish and pour the balsamic mixture over them.
- Bake for 25-30 minutes or until the chicken is cooked through.
- In the last 5 minutes of baking, add spinach and cherry tomatoes to the dish.
- Remove from the oven and let it rest for a few minutes before serving.
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