Into a large, hot frying pan, add 4 tablespoons of olive oil, ginger, garlic, chili and shrimp. Fry for approximately 3 minutes then turn the heat down, squeeze in the juice of 2 lemons, and add butter. Add the parsley and a couple glugs of olive oil. Toss over and remove from heat. You should have a nice, juicy sauce at this point.