01 - Combine whole milk and water in a medium saucepan. Bring to a gentle simmer over medium heat, watching carefully to prevent scorching. Once simmering, slowly whisk in the cornmeal in a steady stream to prevent lumps from forming.
02 - Reduce heat to low and cook polenta for 20 to 25 minutes, stirring frequently to ensure even cooking and prevent sticking. The mixture is ready when thickened and creamy, with no raw cornmeal taste. Remove from heat.
03 - Stir in 2 tablespoons unsalted butter, grated Parmesan cheese, kosher salt, and black pepper until fully incorporated and cheese has melted. Cover and keep warm until ready to serve.
04 - Melt 2 tablespoons unsalted butter in a small saucepan over low heat. Add finely chopped fresh chives, parsley, and lemon zest. Stir to combine and remove from heat. Set aside for drizzling.
05 - Pat scallops completely dry with paper towels. Season both sides generously with kosher salt and freshly ground black pepper. Allow to sit at room temperature for 5 minutes while pan heats.
06 - Heat olive oil and 1 tablespoon unsalted butter in a large nonstick or cast-iron skillet over medium-high heat. Wait until butter foams and pan is thoroughly hot—this ensures proper searing.
07 - Place scallops in the hot pan without overcrowding. Sear undisturbed for 2 to 3 minutes until a deep golden-brown crust forms. Do not move or flip prematurely—this crust is essential for texture and flavor.
08 - Flip each scallop carefully and cook for an additional 1 to 2 minutes. The scallops are done when just opaque throughout and slightly firm to the touch. Avoid overcooking, as scallops become rubbery quickly.
09 - Spoon a generous portion of warm creamy polenta onto each serving plate. Arrange 3 to 4 seared scallops atop the polenta. Drizzle with herb butter if desired. Serve immediately while scallops are hot and polenta remains creamy.