Rinse the scallops under cold water and pat them dry with paper towels. Season both sides with salt and pepper.
In a large skillet, heat the olive oil and 1 tablespoon of butter over medium-high heat. Once hot, add the scallops in a single layer and sear for about 2-3 minutes on each side until golden brown. Remove from skillet and set aside.
In the same skillet, reduce heat to medium and add the remaining tablespoon of butter. Once melted, add the minced garlic and sauté for about 30 seconds. Pour in the heavy cream, whisking continuously until it begins to simmer.
Stir in the grated Parmesan cheese, lemon juice, and zest. Whisk until the cheese melts and the sauce thickens slightly. Season with additional salt and pepper to taste.
Return the seared scallops to the skillet, gently coating them with the creamy sauce. Cook for another minute to heat through. Serve immediately, garnished with fresh parsley.