Steamed Mussels on the Half Shell

Ingredients

• 4 tbsp. rendered duck fat or vegetable oil
• 4 tbs butter
• 6 wholes shallots, minced
• 2 cloves garlic, minced
• 5-6 pounds mussels, cleaned
• 1 1/2 cups dry white wine
• 2/3 cup olive oil
• 4 wholes chives, finely chopped
• 1/2 cup of flat-leaf parsley, stems removed, leaves finely chopped
• 2 sprigs thyme, stems removed, leaves finely chopped
• Juice of 1/2 lemon
• Kosher salt only if necessary
• Piment d'espelette or dried, crushed red pepper