Form the ground beef into a patty. In a frying pan over medium-high heat, cook patty until cooked to your liking; remove from heat and set aside.
Fry egg (sunny-side up or over easy) in the grease from the ground beef.
Assemble this dish by putting a bed of cooked rice in a large bowl, top with hamburger patty, fried egg, and 1 to 2 ladles of hot gravy. Add hot pepper sauce, ketchup, or soy sauce according to your preference.
Makes 1 serving for a very hungry person.
Hawaiian Loco Moco Recipe: https://whatscookingamerica.net/history/locomocohistory.htm