01 -
Heat vegetable oil in a large cast iron or stainless steel skillet over medium heat. Add thinly sliced onions and sprinkle with salt; toss to coat well.
02 -
Stir onions and scrape up the bottom of the pan every 5 minutes, allowing them to cook for 25–35 minutes. Onions should become fragrant and blonde in color; adjust the heat to prevent burning.
03 -
Add vegan burger patties to the skillet; season with salt and pepper. Using a wooden spoon, chop and crumble the patties as they cook. Cook for 10 minutes or according to package directions, ensuring an internal temperature of 74°C.
04 -
Distribute vegan cheese slices over the crumbled burger mixture. Cover skillet with a lid, remove from heat, and let sit for 3–4 minutes until cheese is fully melted.
05 -
Place a quarter of the mixture onto each hoagie roll. Layer with shredded lettuce, sliced tomatoes, and finish with desired condiments.
06 -
Present immediately and enjoy while hot.