Slice the garlic thinly.
Pour olive oil into a pan and heat over medium-low heat.
Add the garlic and peperoncino, and sauté over low heat.
Boil the spaghetti noodles and drain the water.
Add the boiled spaghetti and a bit of pasta water to the pan, and mix while stir-frying.
Season with salt and pepper.
Sprinkle parsley on top to finish.