This is not the cold, mayonnaise-bound potato salad of American picnics. German Kartoffelsalat arrives at the table warm, dressed in bacon fat and vinegar, each slice of potato tender enough to absorb the dressing yet firm enough to hold its shape. It is one of the great salads of the world, though it receives far less attention than it deserves.

In Bavaria and Swabia, this salad appears on Christmas Eve alongside simple frankfurters, a tradition born of Catholic fasting customs that forbade meat on the eve of holy days. Fish and sausages were permitted, and this humble salad became their steady companion. On Christmas Day, it returns to accompany the roast goose or pork that anchors the feast. The flavors are elemental: smoke from the bacon, sharpness from the vinegar, sweetness from slowly cooked onions, and the honest starch of good potatoes holding it all together.

The technique matters more than the ingredient list. You must dress the potatoes while they're still warm. Cold potatoes form a barrier that rejects dressing. Warm potatoes drink it in, becoming saturated with flavor rather than merely coated. This is the difference between a salad that tastes layered and one that tastes assembled.

For large gatherings, this recipe scales beautifully and improves with time. Make it hours ahead, let it rest at room temperature, and rewarm gently before serving. Your guests will believe you spent the morning in the kitchen when you've actually been enjoying their company.