Cut garlic into small slices or cut each slice into 4. You can, of course, chop it finer.
Chop parsley.
Heat the olive oil in a frying pan and sauté the garlic and chillies. The garlic should become translucent and begin to turn a light golden color. Be careful not to burn it, as it browns quickly. If it browns quickly, remove the pan from the heat.
If you're worried about the garlic burning, you can remove it to a plate and add it at the end of cooking the shrimps.
Add the gambas and cook for 1-2 minutes on each side.
Add the chopped parsley, stir and turn off the heat.
Serve in two small earthenware dishes or, if unavailable, on a plate.
Serve these gambas al ajillo tapas piping hot.