01 -
Melt a tablespoon of butter in a big skillet on medium. Lay your split hoagie buns cut side down, let them toast till they're golden, about 1 to 2 minutes. Do the same for all buns so they're toasted all over. Set them aside and keep them cozy.
02 -
Put the skillet back on medium and add four more tablespoons of butter. Toss in the onion slices and cook them for 4-5 minutes until they're soft and barely browned. Scoop them out with a slotted spoon so the extra butter drips off, then set them next to the buns.
03 -
Split up the beef into four oval logs. Sprinkle each with salt, garlic powder, and pepper. Do them in turns, tossing them into the hot pan for about 2 minutes each side to get that nice brown outside. Flip and squash every log into a thin patty with a spatula, then cook them for 2-3 more minutes till they're cooked inside.
04 -
Put the cooked onions back in with the beef patties. Chop everything up into tiny bits using your spatula so it all comes together for the sandwich fillings.
05 -
Layer 2 cheese slices over each chunk of beef mix. Give it about a minute for the cheese to really melt. Stir things around gently so the cheese gets mixed in and melty all over.
06 -
Spread that mayo on the toasted side of the buns. Pile in the hot beef and cheese mixture, split evenly. Lay on the tomato slices and a handful of shredded lettuce. For a classic touch, wrap each up in deli paper, then slice or leave whole—totally your call.