01 - Generously season both sides of each scallop with kosher salt and freshly ground black pepper.
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 to 3 minutes per side until deeply golden brown and just opaque throughout. Transfer to a plate and tent loosely with aluminum foil.
03 - Reduce heat to medium. Add remaining 1 tablespoon butter to the skillet. Sauté minced garlic and diced shallot for 1 to 2 minutes until fragrant and softened, being careful not to brown the garlic.
04 - Stir in Cajun seasoning, smoked paprika, and cayenne pepper. Cook for 30 seconds until spices are fragrant, stirring constantly to prevent burning.
05 - Pour in heavy cream and stock, using a wooden spoon to scrape up any browned bits from the pan bottom. Simmer for 2 to 3 minutes until sauce begins to thicken slightly and coats the back of a spoon.
06 - Add grated Parmesan cheese and fresh lemon juice. Stir continuously until cheese is completely melted and sauce is velvety smooth. Taste and adjust seasoning with additional salt and pepper as needed.
07 - Return seared scallops to the skillet and cook for 1 minute just to warm through. Remove from heat immediately to prevent overcooking.
08 - Transfer scallops to serving plates. Spoon warm Cajun cream sauce generously over each scallop. Sprinkle with chopped fresh parsley and serve immediately while hot.