I like to use fresh large cloves of garlic which roast beautifully.
Use really good quality extra-virgin olive oil in this recipe.
Make sure you get a good colour on the garlic which improves the flavour and taste.
Any herbs like parsley, thyme, basil can be used.
You could even add some sun-dried tomatoes in the oil and make it a garlic tomato confit.
Use low heat to cook the entire dish so the garlic get soft and infuse its flavour in the oil.