Remove the shells and veins from the shrimp and clean them thoroughly.
Slice the garlic thinly.
Boil the spaghetti in salted water and drain in a colander.
Add olive oil to a pan and sauté the garlic over medium-low heat.
When the garlic turns golden, add the shrimp and cook until done.
Add the cooked spaghetti to the pan and season with salt and pepper.
Add parsley and peperoncino, then mix well.
Transfer to a plate and drizzle with a bit more olive oil.