01 - In a large saucepan, bring the milk and water to a gentle simmer over medium heat. Slowly whisk in the cornmeal, stirring constantly to prevent lumps. Reduce heat to low and cook, stirring frequently, until the polenta is thick and creamy, about 20–25 minutes. Stir in the butter, Parmesan, and salt. Keep warm over very low heat, stirring occasionally.
02 - Pat the scallops completely dry with paper towels. Season both sides generously with salt and pepper. Heat the olive oil in a large skillet over medium-high heat. Add scallops in a single layer without overcrowding the pan. Sear for 2 minutes until golden brown. Add the butter to the pan, flip the scallops, and cook for another 1–2 minutes, basting with the melted butter. Scallops should be just opaque in the center. Remove from heat.
03 - Spoon creamy polenta onto warm plates or shallow bowls. Top with seared scallops. Sprinkle with chopped herbs and freshly ground black pepper. Serve immediately with lemon wedges, if desired.