01 - Combine whole milk and water in a large saucepan. Bring to a gentle simmer over medium heat, watching carefully to prevent scorching.
02 - Slowly whisk in coarse cornmeal while stirring constantly. This prevents lumps from forming and ensures smooth texture.
03 - Reduce heat to low. Cook for 20 to 25 minutes, stirring frequently to prevent sticking. Polenta is ready when thick and creamy.
04 - Stir in unsalted butter, grated Parmesan cheese, and kosher salt until fully incorporated. Keep warm over very low heat, stirring occasionally to prevent skin formation.
05 - Pat scallops completely dry with paper towels. Season both sides generously with kosher salt and freshly ground black pepper.
06 - Heat olive oil in a large skillet over medium-high heat until shimmering but not smoking.
07 - Arrange scallops in a single layer without overcrowding. Sear for 2 minutes until golden brown crust forms. Do not move scallops during this time.
08 - Add butter to pan. Flip scallops and cook 1 to 2 minutes longer, basting continuously with melted butter. Scallops should remain just opaque in center. Remove from heat immediately.
09 - Spoon warm creamy polenta into shallow bowls or plates. Arrange seared scallops atop polenta.
10 - Sprinkle with finely chopped fresh chives or parsley. Finish with freshly ground black pepper. Serve immediately with lemon wedges on the side.