If cooking rice, do so first, then rinse well to cool. Add the shrimp. If raw, stir until cooked through; if pre-cooked, move on to the next step immediately. Add the rice, handful by handful, stirring constantly to fry. Make a hole in the middle of the rice and crack the egg into it. Stir quickly but gently, incorporating more and more rice until the egg is well-distributed. Add the soy sauce and lime juice, then season with salt and pepper . Top with the last scallion.
