Make the amogio sauce and set it to the side.
Add the olive oil to a bowl and set aside. In a separate bowl mix the breadcrumbs, parmesan cheese, salt, and pepper until combined.
Taking 1 slice of beef at a time, completely coat it in the olive oil, and then dredge it in the breadcrumbs until coated.
Roll the beef up and set it aside on a cookie sheet tray. Slice it in half if it’s too big.
Add on some of the breaded beef followed up with a ½ bay leaf, onion, peppers, and loose Italian sausage and repeat until the 12” skewer is full, and then repeat until all of the other skewers are full and all of the ingredients have been used. Set them on a cookie sheet tray.
Add a small amount of olive oil to a flat top griddle or a large cast-iron skillet over medium heat and sear the skewers, in batches if need be, for 2-4 minutes per side or until browned and cooked throughout.
Serve the spiedini alongside the amogio sauce and garnish with optional chopped fresh parsley.