准备

• 将芹菜和土豆放在锅中，用水覆盖至少一英寸，然后加1汤匙。盐。煮滚。将热量降低到中等，盖上圆形，然后煮至非常嫩，20至25分钟。流走。将蔬菜放回锅中，用中火放置1至2分钟。摇动并搅拌以蒸发多余的水。用冷水冲洗一个小锅（这将使锅更容易清洁）；倒入牛奶（或半半）。用中火慢火煮到下方；搁置。 Force the vegetables through a ricer or food mill and return them to the boiling pot. Beat in the butter with a wooden spoon. Add the milk to the potatoes a little at a time, beating vigorously after each addition. Stir in the horseradish and lemon juice. Add the remaining 1-1/2-tsp. salt, season with pepper, and serve.