Another vote for Nor-Joe. I think lots of places make good muff's, but Nor-Joe really stands out to me as well as Central Grocery, but it isn't worth the hassle of going to the Quarter to get one. I can't remember having a muffeletta on the north shore, except in Hammond, at Ryan's Deli on Range Rd. They do a seafood muffeletta and some rave about it. I thought it was just OK. I like to make them at home more than anything. I bake my own bread and use Boscoli olive salad. Hot or cold are both good in my opinion.