Break up the garlic bulb by thumping it or pressing down heavily using the side of a knife.
To remove the skin from a clove, put it on a chopping board and lay the side of a cook's knife on it. Push lightly to break the skin, then pull away.
For sliced garlic: finely slice the garlic widthways.
For chopped garlic: chop the garlic roughly, then sprinkle with a little salt to help break the garlic down and continue chopping until very fine.
For crushed garlic: finely chop the garlic, then use the side of the knife blade to press the garlic against the board, making a smooth paste.