01 - Generously season both sides of the scallops with kosher salt and freshly ground black pepper, ensuring even coverage for optimal flavor penetration.
02 - Heat olive oil and 1 tablespoon butter in a large skillet over medium-high heat until shimmering. Arrange scallops in a single layer without crowding. Sear for 2-3 minutes per side until deep golden brown crust forms and centers turn just opaque. Transfer to a plate and tent loosely with aluminum foil.
03 - Reduce heat to medium. Add remaining butter, minced garlic, and diced shallot to the skillet. Sauté for 1-2 minutes, stirring frequently until fragrant and shallots are translucent but not browned.
04 - Stir in Cajun seasoning, smoked paprika, and cayenne pepper. Cook for 30 seconds, constantly stirring to release essential oils and prevent burning. The spices should become highly aromatic.
05 - Pour in heavy cream and stock while whisking continuously. Scrape up any browned bits from the pan bottom with a wooden spoon. Allow mixture to simmer for 2-3 minutes until slightly reduced and thickened enough to coat the back of a spoon.
06 - Add Parmesan cheese and lemon juice, stirring until cheese completely melts and sauce achieves silky smooth consistency. Taste and adjust seasoning with additional salt and pepper as needed.
07 - Return scallops to the skillet, spooning sauce over the top. Warm through for 1 minute. Remove from heat, garnish with fresh parsley, and serve immediately with additional sauce ladled over each portion.