Schnittlauchsauce

Gretel always said you could judge a Viennese cook by three things: her broth, her Strudel, and her Schnittlauchsauce. Two of those take hours. This one takes twenty-five minutes, and there's still nowhere to hide. Every ingredient is plain. Bread, eggs, mustard, oil, chives. That's it. If your technique is right, you get a cold, silky emulsion with a sharp green bite that makes warm Tafelspitz sing. If your technique is off, you get a greasy puddle that tastes like regret.

I grew up watching Gretel make this sauce in my grandmother Eva's kitchen in Kent, always when there was boiled beef on the table. She'd soak stale bread in broth, mash the egg yolks by hand, and pour the oil in so slowly I thought she'd fallen asleep standing up. Then she'd pile in the chives, more than seemed reasonable, and taste it once. She almost never adjusted it. Decades of making the same sauce had put the proportions in her hands.

Schnittlauchsauce belongs to Tafelspitz the way the glass of water belongs to Viennese coffee. You can serve the beef without it, technically, but nobody in Vienna would. At my restaurant in Salzburg, the sauce goes out cold on its own small dish, next to Apfelkren (apple-horseradish sauce) and a spoonful of Preiselbeeren, and every plate comes back empty. The sauce is simple. That's what makes it good. Austrian cooking doesn't dress up honest food. It puts honest food on the table and trusts you to taste the difference.