Prime Rib Sandwich with Horseradish Crema

Pro tips

• Slice prime rib as thin as possible (1/8 inch) to maximize broth absorption and tenderness.
• Warm the Italian beef broth to 160-180°F and dip meat briefly (2-3 seconds per side) just before assembly to prevent a soggy bun.
• Caramelize onions low and slow (15-20 minutes) for deep sweetness that balances the sharp horseradish.
• Toast the sesame seed bun lightly to create a structural barrier against broth saturation.

Substitutions

• Italian beef broth → beef stock or consommé (use same volume)
• Fontina cheese → provolone or smoked gouda (melts evenly)
• Sesame seed bun → ciabatta roll or focaccia (more structure)

Storage & make-ahead

Assemble the sandwich fresh to order. Store leftover prime rib and horseradish crema separately in airtight containers for up to 3 days; reheat meat gently in warmed broth before reassembling.

Can I use a different cut of beef for this sandwich?

Yes. Thinly sliced ribeye, sirloin tip, or even leftover roast beef work well. Prime rib offers richness and tenderness, but any tender beef cut will absorb the broth effectively.

How do I make horseradish crema at home?

Blend prepared horseradish with sour cream or crème fraîche, a touch of lemon juice, and salt to taste. Adjust horseradish intensity to preference.

Can I prepare the horseradish crema ahead of time?

Yes, make it up to 2 days ahead and refrigerate in an airtight container. Flavors will meld and intensify slightly.

What's the best way to dip the meat in broth without soaking the bun?

Dip the meat just before assembling, and lightly toast the bun to create a moisture barrier. Add toppings quickly to minimize absorption.

Can I substitute fontina with another cheese?

Provolone, smoked gouda, or taleggio work well. Avoid low-melting cheeses; choose one with a creamy, slightly nutty profile.