01 - Pour the milk and water into a large saucepan. Bring to a gentle simmer over medium heat, watching carefully to prevent scorching.
02 - Slowly whisk in the cornmeal while stirring constantly. This prevents lumps from forming. Once fully incorporated, reduce heat to low.
03 - Simmer over low heat for 20 to 25 minutes, stirring frequently to prevent sticking. The polenta is ready when thick, creamy, and smooth. Stir in the butter, Parmesan cheese, and salt. Keep warm over very low heat, stirring occasionally.
04 - Pat the scallops completely dry with paper towels. Season both sides generously with salt and pepper. Proper drying ensures a good sear.
05 - Heat olive oil in a large skillet over medium-high heat until shimmering. Arrange scallops in a single layer without crowding the pan. Sear for 2 minutes until a golden-brown crust forms.
06 - Add butter to the pan. Flip each scallop and cook for 1 to 2 minutes more, basting continuously with the foaming butter. The scallops are done when just opaque in the center. Transfer immediately to a plate.
07 - Spoon a bed of warm polenta onto each serving plate or shallow bowl. Arrange seared scallops on top. Sprinkle with chopped fresh herbs and additional black pepper. Serve at once with lemon wedges on the side.