Instructions: 1. In a large saucepan, heat olive oil and saute onions until soft and lightly browned. Add jalapeno, tomatillos, garlic, cumin and oregano.

Saute 5 minutes more.

2. Add stock, bring to a boil, then lower heat and simmer uncovered 10 minutes. Transfer to a blender or food processor and puree, in batches if necessary. Refrigerate until well chilled.

3. At serving time, stir in tequila, lime juice, salt and Tabasco to taste, cilantro, sugar and yogurt.

Serves 8 as a starter course.

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