Can I make this sandwich ahead of time?
Assemble the sandwich up to 2 hours before serving, but wait to add the arugula until just before eating to prevent sogginess. Warm the gravy separately for dipping.
What bread can I use instead of focaccia?
Sourdough, ciabatta, or thick-cut white bread work well. Avoid soft breads like sandwich bread, which won't hold the heavy fillings.
Should I toast the focaccia?
Lightly toasting the bread helps it hold up to the moist fillings (potatoes, cranberry sauce, gravy) and prevents it from becoming soggy.
How do I keep the gravy warm for dipping?
Reheat gravy in a small saucepan over medium-low heat or in a microwave-safe bowl. Transfer to a shallow dish for dipping just before serving.
Can I make this with leftover chicken or ham instead?
Yes—any roasted poultry or ham works. Adjust seasoning to taste since other meats may have different salt levels than turkey.