Ingredients

1. 2 teaspoons vegetable oil
2. 1 medium onion, finely chopped
3. 1 tablespoon plus 1 teaspoon Madras curry powder
4. 1 cup dry white wine
5. 1 cup whole-milk yogurt
6. 1 teaspoon honey
7. Salt
8. 2 pounds mussels, scrubbed and debearded
9. 1 cup water

Directions

1. Heat the vegetable oil in a small skillet. Add the onion and cook over moderately low heat, stirring, until translucent, about 8 minutes. Add the curry powder and cook, stirring, for 2 minutes longer. Add 2 tablespoons of the wine and cook until the liquid evaporates.
2. Transfer the curry mixture to a blender and let cool slightly. Add 2 tablespoons of the yogurt and the honey and blend until smooth. Pour the sauce into a bowl. Stir in the remaining yogurt and season with salt. Refrigerate until chilled. 
3. In a large pot, combine the mussels with the remaining wine and the water. Cover and cook over high heat until the mussels open, about 5 minutes; discard any that don't open. Using a slotted spoon, transfer the mussels to a large platter; let cool. Serve the mussels with the curry sauce on the side.
   

Make Ahead

The curry sauce can be refrigerated for up to 2 days.