Place a large pan over medium heat.
Open the hot dog buns, taking care not to separate the two halves completely, and toast until golden. Set the hot dog buns aside.
Drizzle the oil in the pan. Once heated, add the onions and cook, stirring occasionally, until softened and starting to turn golden.
Stir in the garlic and cook until just fragrant, then add the ground beef.
Cook stirring often and breaking up the pieces until browned.
Season the ground beef with the curry powder, salt, and pepper.
Adjust seasonings to taste. Remove from heat and set aside to cool slightly.
Place the eggs in a large bowl and beat gently.
Add the slightly cooled ground beef mixture to the eggs and stir to combine.
Place the large pan over medium low heat and grease with oil.
Add about 1/6th of the egg and beef mixture to the pan in a thin, even layer slightly larger than the size of the opened hot dog. This is about 1/3 cup (80 milliliters) for me.
Place the hot dog bun over the egg mixture in the pan, open side down, and cook until golden and set.
Use a spatula to carefully, but quickly in one motion, remove the hot dog bun with the egg side up to a plate.
If desired, you can also toast the bread side of the sandwich.
Repeat with remaining hot dog buns and ground beef egg mixture, greasing the pan as needed.
Serve the sandwiches immediately with desired toppings such as tomatoes, cucumbers, lettuce, sriracha, and mayonnaise.