Preheat the oven to 350 degrees. Cut 2 sheets of parchment paper to fit a large baking sheet. Place 1 sheet of the parchment on a work surface. Top with a sheet of phyllo and brush with the melted butter. Sprinkle 2 teaspoons of the granulated sugar over the phyllo. Repeat with 2 more sheets of phyllo so that you have a stack of 3 sugared sheets. Using a ruler, trim the phyllo to a 12-by-16-inch rectangle, then cut it into twelve 4-inch squares. Slide the parchment onto a baking sheet and top with the second sheet of parchment paper. Bake for 18 minutes, until the phyllo squares are golden and crisp. Let cool completely.

Preheat the broiler. Put the brown sugar in a food processor; pulse to break up any lumps. In the bowl of a standing electric mixer fitted with a whisk, beat the egg whites at medium-high speed until soft peaks form. Beat in the brown sugar at high speed, a few tablespoons at a time, until the whites are glossy, 2 to 3 minutes. Transfer the meringue to a pastry bag with a plain tip.

Spoon a dollop of lemon curd onto each phyllo square. Pipe a layer of meringue over the lemon curd (alternately, you can spoon the meringue over the curd). Broil 6 inches from the heat for 1 minute, or until lightly toasted. Set 6 phyllo squares on plates and top them with the remaining 6 squares. Garnish with raspberries and serve.