Finely chop the garlic and chili pepper and fry them in a pan with a little butter. After 5-6 seconds, add the prawns, sauté, and then add some wine. Add the finely chopped green parsley and leave the pan over a high heat for 1 minute to reduce the wine.
For the chimichurri sauce, chop the greens finely. Add the minced garlic and pepperoncini. Mix with salt, pepper, olive oil, and lemon juice.