Add 1 tablespoon butter to a large skillet or wok set over medium-low heat. Once the butter has melted, add the eggs and scramble until cooked to your desired doneness. Transfer the eggs to a plate and set them aside.
In a small bowl, whisk together the soy sauce and hoisin sauce. Set it aside.
Add 2 tablespoons butter to the skillet and increase the heat to medium-high. Add the diced pork and cook until no longer pink, about 5 minutes.
Add the remaining 1 tablespoon butter then add the onions, garlic, peas and carrots and cook, stirring, until fragrant, about 2 minutes.
Add the rice and reserved sauce and stir to combine. Cook, stirring occasionally, until warmed through then fold in the scrambled eggs.
Garnish the fried rice with scallions and sesame seeds then serve.