Cheesy Baked Mussels My SeasideInspired Appetizer

Ingredients

• 2 pounds (900g) fresh mussels, scrubbed and debearded
• 1/4 cup (60ml) dry white wine (e.g., Sauvignon Blanc or Pinot Grigio)
• 4 tablespoons (60g) unsalted butter
• 2 cloves garlic, minced
• 1/4 cup (30g) finely chopped onion or shallot
• 1/4 cup (15g) chopped fresh parsley
• 1/4 cup (15g) chopped fresh chives
• 1/2 cup (50g) breadcrumbs, plain
• 1/2 cup (50g) grated Parmesan cheese
• 1/4 cup (25g) grated Gruyere cheese
• Salt and freshly ground black pepper to taste
• Lemon wedges, for serving