Loco Moco

Ingredients

  • 2 (4 ounce) patties ground beef
  • 1 pinch salt and freshly ground black pepper to taste
  • 1 pinch cayenne pepper

For the Gravy:

  • 1 ½ cups beef stock
  • 4 teaspoons soy sauce
  • 1 teaspoon Worcestershire sauce
  • 2 drops sesame oil, or to taste
  • 2 teaspoons ketchup
  • 2 teaspoons white sugar (Optional)
  • 4 teaspoons cornstarch
  • 2 teaspoons unsalted butter, divided
  • 2 tablespoons minced green onions, white and light green parts only
  • 2 eggs