AT A GLANCE
German cooking is rich in potato salads, be they vinaigrette-dressed and flecked with crisp speck or creamy like this version, where floury potatoes become almost mash-like when mixed with a mustardy mayonnaise. For an extra kick we add some of the liquid from the pickles to the mix.
|01||For mustard and horseradish mayonnaise, whisk yolks, mustard and half the vinegar in a bowl to combine. While whisking continuously, gradually add oil, starting with a few drops at a time then in a thin steady stream, until thick and emulsified. Whisk in horseradish and remaining vinegar, season to taste and refrigerate until required. Makes about 1¼ cups; mustard and horseradish mayonnaise will keep refrigerated for 5 days.|
|02||Combine potatoes and enough cold salted water to cover generously in a large saucepan, bring to the boil over medium-high heat and cook until very tender when pierced with a skewer or sharp knife (45-50 minutes). Drain, set aside to cool, then peel and thickly slice. Transfer to a large bowl, add pickle, pickling liquid, stock, vinegar, onion and garlic, season to taste and stand until cooled to room temperature (20-30 minutes).|
|03||Whisk sour cream and half the mustard and horseradish mayonnaise (reserve remainder for another use) in a separate bowl to combine and season to taste. Add to potatoes, stir to combine well (the potatoes will break up a little as you do this), then stir in herbs and serve at room temperature scattered with extra herbs.|