Preheat oven to 375°F (190°C). Start by cutting the lobster shells down the center using kitchen shears and carefully pull the meat out, laying it over the shell. Place the lobster tails in a baking dish, ensuring that they are well-positioned and not overcrowded.
Prepare the sauce: In a medium saucepan over medium heat, melt 1/4 cup of butter. Once melted, add 4 minced garlic cloves to the pan, stirring for about 1 minute until fragrant. Gradually stir in 1/2 cup of heavy cream, followed by 1/4 cup of grated Parmesan, 1 tablespoon of lemon juice, and season with salt and pepper to taste. Cook the sauce for about 3-5 minutes, stirring continuously until it thickens slightly.
Coat the lobster tails: Take the prepared sauce and generously spoon it over the lobster tails, ensuring they are fully covered. Bake in the preheated oven for 12-15 minutes until the lobster meat is opaque and cooked through.
Garnish and serve: Once cooked, remove the lobster tails from the oven and garnish with 1 tablespoon of chopped parsley and a squeeze of fresh lemon juice. For an added touch of flavor, consider broiling the tails for 2 minutes for a golden finish.