Take a large mixing bowl; add the olive oil, pepper, and salt mix it properly, and set it aside.
Add the butter to a pot and cook it for 3 minutes or cook it until the butter has melted properly.
Cook it for more than 1 minute after adding the garlic and onion.
Now, add the shrimp to the melted butter and also cook it for 2 to 3 minutes or cook it until it shrimp becomes pink and soft properly and remove it from the heat.
Season it with parsley and minced garlic before serving.