Ingredients

Makes about 1 quart

3 tablespoons olive oil

2 large onions, chopped

2 serrano chiles, chopped, with seeds

2 tablespoons minced garlic

1 teaspoon freshly ground black pepper

Two 2-ounce cans anchovies, drained

1/4 teaspoon ground cloves

1 tablespoon kosher salt

1 lemon, peel and white pith removed and discarded

2 cups dark corn syrup

1 cup molasses

1 quart distilled white vinegar

1/4 pound fresh horseradish, peeled and grated

Preparation

In a heavy pot over high heat, combine the oil, onions and chiles. Cook, stirring, until the vegetables are soft, about 3 minutes. Add the garlic, pepper, anchovies, cloves, salt, lemon, corn syrup, molasses, vinegar, 2 cups water and the horseradish. Bring to a boil.

Reduce the heat and simmer, stirring occasionally, until the mixture barely coats a wooden spoon, about 6 hours.

Strain through a fine-mesh sieve into a bowl and let cool to room temperature. Store in a bottle, preferably one with a spigot. Keeps in the refrigerator indefinitely.