Lobster Thermidor Seafood Appetizer | 4 – 1 1/2 pound lobsters need to cook, tablespoons butter, 3 tablespoons all purpose flour, 1 teaspoon salt, 1/2 teaspoon ground nutmeg, 1/8 teaspoon paprika, 1 1/2 cups half and half, 3 tablespoons medium sherry, 1/2 cup shredded Cheddar cheese, parsley for garnish