Instead of poppy seeds, you can use black sesame seeds for garnish.
It’s best if your ingredients are at room temperature before you begin so that everything bakes evenly.
We state “very softened butter” in the ingredients. It should be spreadable but not melted, a pudding-like texture is what we shoot for.
You can use shredded or sliced mozzarella, provolone, Swiss, cheddar, or Gruyere.
If you are making these sandwiches to take with to a party, bake them in a 13x9 foil pan. Cover with foil and take with, no worrying about getting your pan back!