Hanjan Brisket and Kimchi Fried Rice

Name: Hanjan Brisket and Kimchi Fried Rice
Ingredients: 4 cups day-old cooked rice; 2 tablespoons grapeseed or canola oil; 1/3 pound beef brisket, thinly sliced; Salt and freshly ground black pepper; 1 medium onion, cut into small dice (about 1 cup); 1 cup baechu kimchi (Napa cabbage kimchi), cut into small dice; 1 cup chong gak kimchi (Korean radish kimchi), cut into small dice; 4 stems Chinese chive blossoms, chopped; 3 tablespoons soy sauce; 1 tablespoon sesame oil; 1 tablespoon toasted sesame seeds; 3 scallions, thinly sliced; 1 tablespoon unsalted butter; 4 large eggs