01 - Season both sides of the scallops evenly with salt and pepper, ensuring thorough coverage for optimal flavor.
02 - Heat olive oil and 1 tablespoon butter in a large skillet over medium-high heat. When the butter foams, arrange scallops in a single layer without crowding. Sear for 2–3 minutes per side until deeply golden and just opaque in the center. Transfer to a plate and tent loosely with foil.
03 - Reduce heat to medium. Add remaining butter, garlic, and shallot to the same skillet. Sauté for 1–2 minutes, stirring frequently, until fragrant and translucent but not browned.
04 - Add Cajun seasoning, smoked paprika, and cayenne pepper to the skillet. Stir constantly for 30 seconds to bloom the spices and release their essential oils.
05 - Pour in heavy cream and stock, using a wooden spoon to scrape up any caramelized fond from the pan bottom. Simmer for 2–3 minutes, stirring occasionally, until the sauce thickens enough to coat the back of a spoon.
06 - Whisk in Parmesan cheese until fully melted and incorporated. Add lemon juice and stir until smooth. Taste and adjust seasoning with additional salt and pepper as needed.
07 - Return scallops and any accumulated juices to the pan. Cook for 1 minute, turning once, just until warmed through. Remove from heat immediately to prevent overcooking.
08 - Transfer scallops to serving plates or a platter. Generously spoon sauce over each scallop, garnish with chopped parsley, and serve immediately while hot.