Ingredients :

• Diced sirloin beef — Pick a piece with some visible fat on the surface—not huge amounts, but enough so the meat stays juicy. Avoid cubes that are too small (less than 3 cm), as they will disintegrate after six hours. If you can’t find sirloin, chuck roast works very well here, sometimes even better for tenderness.
• Potatoes — Russet or Bintje are the best—they withstand long cooking without turning into mash and soak up the broth like sponges. Cut them into 3-4 cm cubes, no smaller. Yukon Gold also work if you prefer a more buttery texture.
• Aged cheddar — Not the mild, plastic-wrapped sliced cheddar. Use an extra-sharp or mature cheddar, grated yourself if possible—it melts much better than pre-shredded packs which often contain anti-caking agents. The sharp taste of old cheddar is exactly what’s needed to stand up to the richness of the broth.
• Worcestershire sauce — This is the little secret of this dish. Two tablespoons might seem like nothing, but it brings an umami depth you couldn’t identify blindly—slightly vinegary, caramelized, and a bit spicy. Lea & Perrins remains the standard, but any quality brand will do.