Mix the bread crumb with the cheeses, the herbs and the garlic. Lay the beef on a board and sprinkle with the cheese and herb mixture evenly, Add a slice of prosciutto and place a small roll of sausage in the middle, roll each slice up securing it with a tooth pick, dust each roll with flour and set aside. Preheat a frying pan and add a little oil, fry the beef rolls on all sides until golden. Pour the Marinara sauce into the crock pot and lay all the brasciole in it, lid on and press start.