Vegetable
Armoracia rusticana
S tier
Armoracia rusticana is horseradish—a perennial brassica whose thick white root explodes into volatile heat when grated, driven by sinigrin breaking into allyl isothiocyanate. Freshly grated paste is brightest; jarred cream styles mellow with vinegar. Leaves are edible but the root is the crop. Grate into cream for roast beef, spike bloody marys, or fold into mustard. Species covers all true horseradish. Work in ventilated space; fumes are intense.
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History
Central and Eastern European use of wild and garden horseradish is ancient.
German and Central European cuisines codified horseradish with meats and fish.
Illinois and Midwest farms became major US horseradish producers.
Prepared horseradish and wasabi impostors kept A. rusticana in global condiment aisles.