Pomodorini Confit

Ingredients:
500g cherry tomatoes (pomodorini)
3 tbsp extra virgin olive oil
3 garlic cloves, peeled and smashed
1 tbsp fresh thyme (or rosemary, depending on preference)
1 tbsp balsamic vinegar (optional)
Salt and pepper, to taste
A pinch of sugar (optional, to balance the acidity)