Add prawns and fry them for 4-6 minutes, often tossing the pan, until they've turned red.
Stir in 50g butter, garlic and parsley.
Cook for 2-3 minutes, moving the prawns around so that they are all coated in garlic butter.
Serve in fresh bread to mop up the sauce.
Notes
For a little sophistication, you can add dry white wine. In this case, remove the prawns from the pan after frying them in oil, deglaze the pan with 1/2 glasses of white wine and allow the alcohol to evaporate. Stir in butter, garlic and parsley, return the prawns to the pan and cook for further 2 minutes, tossing every now and then.
You can also add red chili flakes for a kick, and drizzle with fresh lemon juice to finish.