Raspberry Chocolate French Macaroons

ingredients

For macaroons:
6 oz sliced blanched almonds (not slivered; 2 cups)
1 1/2 cups confectioners sugar
3 large egg whites
3/4 teaspoon salt
3 tablespoons granulated sugar
Red or pink food coloring
For chocolate raspberry ganache:
3 oz fine-quality bittersweet chocolate (60 to 64% cacao), finely chopped
1/3 cup heavy cream
1 tablespoon unsalted butter, softened
1/16 teaspoon raspberry extract (preferably McCormick brand)
Special equipment: parchment paper; a gallon-size sealable plastic bag (not pleated)