Porcini Rubbed Prime Rib Focaccia Sandwich

Pro tips

• Slice prime rib paper-thin when cold; warm gently before serving to restore tenderness without drying the meat.
• Warm the Taleggio fonduta to 120–130°F so it flows onto the focaccia without clumping; cold fonduta will congeal and resist spreading.
• Layer conserva and fonduta before adding prime rib to prevent the meat's heat from melting the bread prematurely.
• Drizzle olive oil just before serving; it acts as a flavor amplifier and adds richness that ties the savory, umami-forward components together.

Substitutions

• Porcini-rubbed prime rib → beef ribeye or NY strip steak (grind dried porcini, salt, pepper; rub and sear; slice thin)
• Taleggio cheese fonduta → fontina or reblochon fonduta (warmed, similar creamy texture and mild funk)
• Mushroom conserva → porcini mushroom paste, duxelles, or mushroom tapenade (adjust consistency with olive oil if needed)
• House-made focaccia → ciabatta or pane toscano (maintain oil-rich, open crumb structure)

Storage & make-ahead

Store assembled sandwich wrapped in parchment for up to 2 hours at room temperature; fonduta and conserva will firm as it cools. Not recommended for overnight storage.

Can I use store-bought focaccia instead of making it from scratch?

Yes. Quality store-bought focaccia works well; warm it slightly before assembly to enhance the bread's texture and help the fonduta meld slightly.

How should the prime rib be sliced for this sandwich?

Slice as thinly as possible, ideally using a meat slicer or sharp knife on chilled leftover prime rib. Thin slices ensure tenderness and allow the bread to hold the sandwich together.

What can I use if I can't find Taleggio cheese?

Fontina, Reblochon, or taleggio's cousin smear—any washed-rind cheese with similar creaminess and mild flavor works. Mozzarella di bufala is a leaner substitute.

Can I assemble this sandwich ahead of time?

Assemble no more than 30 minutes before serving. Layer the focaccia, fonduta, and conserva first; add prime rib and olive oil just before eating to prevent sogginess.

How do I make or source mushroom conserva?

Conserva is a thick, cooked-down mushroom paste; Porchetta Shop likely makes it in-house. Substitute with porcini mushroom paste, duxelles, or a thick mushroom tapenade.