Preheat the oven to 230 °C.
Cut the rolls in half. Place the bottoms on a platter and place two slices of provolone on each.
Cut half a centimeter off the bottom of the asparagus. Place the asparagus in four portions together on a baking sheet lined with parchment paper. Top them with the slices of guanciale. Season with pepper and salt.
Place them in the oven at 230 °C for about 8 minutes until the bacon slices are nice and crispy and the asparagus is slightly roasted.
Melt butter in a large pan. Whisk the eggs vigorously with pepper and salt and pour into the pan.
Cook a large omelet that is still runny; this is called ‘baveuse’. Cut the omelet into quarters and place the pieces on the rolls with cheese. Top with the roasted asparagus and crispy guanciale, and cover with the ‘hats’ of the rolls.
Put sriracha mayonnaise on the table, a pot of coffee, and enjoy.