Lamb Ravioli | Mains - non veg

Ingredients

• 4 cups all-purpose flour, plus more as needed
• 1 teaspoon kosher salt
• 6 large eggs
• 2 tablespoons extra-virgin olive oil
• 1 medium yellow onion, finely chopped
• 2 garlic cloves, minced
• Kosher salt, to taste
• Freshly cracked black pepper, to taste
• 5 ounces baby spinach (about 4 lightly packed cups)
• 1 pound ground lamb
• 2 large eggs, beaten
• 1/2 cup packed grated Parmesan cheese, plus more for serving
• 1/2 cup panko bread crumbs
• 1/4 cup loosely packed fresh flat-leaf parsley (leaves and small stems only), finely chopped
• 2 tablespoons loosely packed fresh mint (leaves and small stems only), finely chopped
• 1/2 cup mint leaves, cut into thin ribbons (or left whole if small), for serving
• 1 cup (2 sticks) unsalted butter
• Flaky sea salt, to taste