Easy Lobster Thermidor Recipe - Restaurant Quality at Home

Ingredients

• 2 cooked Maine lobsters (1.5-1.75 pounds each)
• 2 tablespoons unsalted butter
• 2 tablespoons minced shallots
• 1/2 teaspoon minced garlic
• 2 tablespoons all-purpose flour
• 2 tablespoons cognac or brandy
• 3/4 cup milk
• 1/4 cup heavy cream
• 3/8 teaspoon salt, divided
• 1/8 teaspoon ground white pepper
• 1/2 cup plus 2 tablespoons finely grated Parmesan
• 1 tablespoon dry mustard powder
• 1 tablespoon finely chopped fresh tarragon
• 2 teaspoons finely chopped parsley, plus more for garnish
• 1/4 cup shredded Gruyere cheese