Garlic bread consists of bread topped with garlic and olive oil or butter and may include additional herbs, like chives.
It is then either grilled or broiled until toasted, or baked in a conventional or bread oven.
It is typically made using a baguette which is partially sliced downwards.
This allows the condiments to soak into the loaf while keeping it in one piece.
The bread is then stuffed through the cuts with oil and minced garlic before baking.
Alternatively, butter and garlic powder are used, or the bread is cut lengthwise into separate slices.
These are then individually garnished.
Some variants are topped with a variety of cheeses, often mozzarella, cheddar or feta.
Some restaurants use clarified butter in place of olive oil. (source)
So can hamsters eat garlic bread at all?
It is not a great food for them to eat, but they can nibble it and they will be fine.