Take the meat out of the refrigerator 2 hours before you start cooking.
Mix everything for the butter together.
Slice the rolls in half and toast them, spreading all the insides of the 4 rolls with garlic butter.
Slice the onion into strips, add 2 tbsp of olive oil to the pan, and let the onion caramelize nicely until brown. Stir regularly.
Heat a grill pan over the fire, season the entrecôtes with pepper and salt, and brush with a thin layer of olive oil, cooking them for 2 minutes on each side. Let them crust well. Place on a plate and let rest for 2 minutes. Now slice the meat into the finest strips possible. Cut off large pieces of fat.
Preheat the oven to 200 degrees.
Place the rolls with the spread side up in the oven for 2 minutes, then take them out.
Generously top the 4 bottom halves of the rolls with the caramelized onions, entrecôte strips, and grated provolone. Put them back in the oven and bake for another 2 to 3 minutes until the cheese is melted.
Place the tops on and serve immediately.
Tips
No extra tips needed, Just Enjoy!