Japanese Beef Fried Rice (Chahan)

Melt butter in a large saute pan over medium-low heat. Saute carrots, green beans, onion, and garlic in the hot butter until onions are transparent, 5 to 7 minutes. Add ground beef to the vegetables and season with salt and pepper. Cook and stir until ground beef is browned and crumbly and carrots are softened, 5 to 7 minutes. Add rice and mix well.

Crack the egg into a bowl and beat using a fork. Mix into rice mixture until egg is no longer runny, 3 to 4 minutes.

Stir in soy sauce. Taste and add more soy sauce, salt, and pepper to taste. Mix rice well. When you're satisfied with the seasoning, turn off the heat and serve.