Use paper towels to thoroughly pat the scallops dry on all sides to remove excess moisture, which helps achieve a good sear. Set aside.
Place your heavy skillet over medium-high heat and add a tablespoon of neutral oil. Let the oil heat until it shimmers and you can hear a faint crackle—this means it's ready.
Generously season each scallop on all sides with sea salt, pressing lightly to help the salt adhere. Carefully place the scallops in the hot pan, laying them away from you to avoid splatters.
Let the scallops cook without moving them for about 2 minutes, watching for a deep golden-brown crust to form underneath. You’ll hear a satisfying crackle as they sear.
Carefully flip each scallop using tongs or a spatula, and cook for another 1-2 minutes until the second side is also golden and the scallops are opaque and firm to the touch.
Remove the scallops from the pan and let them rest briefly on a warm plate. Meanwhile, add a tablespoon of butter to the pan and squeeze in fresh lemon juice, swirling to create a quick, glossy pan sauce.
Drizzle the warm pan sauce over the scallops, and squeeze additional lemon juice for brightness. Serve immediately while the crust is crispy and the interior tender.