Add ingredients to a mixer with dough hook and mix on low for about 3 minutes or until the dough is combined into a mass. Increase speed to high and mix for another 4-5 minutes. The dough is fully mixed when you tug it and it doesn't shear or tear.
Alternatively If mixing by hand, add ingredients to a bowl and stir with a sturdy spoon for as long as the dough will allow you to mix it with a spoon. From there, switch to a soaking wet hand and squeeze and turn the dough with your hand then knead dough until it forms into a smooth ball.
Transfer dough to a bowl and round into a taught ball. Cover and ferment at room temp for 2 hours.
After the 2 hours, the dough should have risen by about double. Transfer dough to a well floured work surface then degas to remove large air pockets. Fold and preshape dough. Cover dough with bowl or damp towel to rest for 25 minutes.
Shape dough into a "party" sized loaf. Transfer to a parchment lined sheet tray, seam side down. Cover with another sheet tray or damp towel to proof for 60-75 minutes.
After proofing, the loaf should have risen by about 2x. A properly proofed dough will slowly spring back when poked.
Score loaf longways down the center of the loaf. Spray loaf generously with water then transfer to a preheated 375°F/190°C oven. Spray loaf once more then quickly close oven door and bake for 30-35 minutes.
After baking, brush the top of the loaf with melted butter. If you don't build the sub immediately after baking, refresh bread in a 375°F/190°C oven for 5-8 minutess to crisp the crust before making the sandwich.
To build, slice sub horizontally (parallel to the cutting board) then layer as follows:
5-6 spoonfuls of chopped giardiniera - press it lightly into the bread
Mortadella - ribboned onto the sandwich not tightly stacked
Salami - again, ribboned
Prosciutto - ribboned!
Shredded lettuce - about 3 large handfuls. Press down lightly
Shaved red onions
Vinaigrette, several spoonfuls drizzled all over the sandwich
A layer of thinly sliced provolone
On the top of the sub roll, spread a generous amount of calabrian mayo Cut and serve. I like to use long picks to keep the masterpiece held together.
-