In a large bowl, combine the lamb and the veal, red pepper flakes, cheese, parsley, thyme, garlic, nutmeg, egg, and bread crumbs, season with salt and pepper, and mix well to make a homogenous mixture. Form the mixture into a loaf and dust the entire surface with all-purpose flour.
In a Dutch oven, heat the olive oil over medium heat and add the loaf. Brown on all sides in the oil and cook over low for 90 minutes. Slice and serve with lemon alongside.