01 -
Heat 1 tablespoon butter in a large skillet over medium heat. Position each split hoagie roll, cut side down, and toast for 1–2 minutes until golden brown. Repeat with all rolls, ensuring uniform toasting. Transfer toasted rolls aside and keep warm.
02 -
Return skillet to medium heat and melt 4 tablespoons butter. Add sliced onions and sauté for 4–5 minutes until softened and lightly caramelized. Remove onions with a slotted spoon, draining excess butter, and set aside.
03 -
Divide the ground beef into four elongated log shapes. Season evenly with salt, garlic powder, and black pepper. Working in batches, place beef logs in the hot skillet and sear for 2 minutes per side, developing a flavorful crust. Flip and flatten each log into a thin patty using a spatula. Cook an additional 2–3 minutes until cooked through.
04 -
Return sautéed onions to the skillet with beef patties. Using a spatula, chop beef and onions together into fine pieces, ensuring an even blend for the sandwich filling.
05 -
Place 2 slices of American cheese over each portion of the chopped beef mixture. Cook for about 1 minute, allowing cheese to melt fully. Gently stir to incorporate melted cheese evenly, achieving a smooth, cohesive filling.
06 -
Generously spread mayonnaise over the cut side of each toasted roll. Evenly portion the warm chopped beef and cheese filling into the rolls. Top with sliced tomatoes and shredded lettuce. For an authentic finish, wrap each sandwich in deli paper and serve whole or halved according to preference.