Preheat oven to 300F. Beat shortening in a large bowl with an electric mixer on medium to high speed for 30 seconds. Add sugar, baking powder, and salt. Beat until combined, scraping side of bowl occasionally. Beat in egg, vanilla, and almond extract until combined. Beat in as much flour as you can with the mixer. Stir in any remaining flour.

Divide dough into three equal portions. Roll each portion into a 10-inch log. Roll logs in nuts. Place logs 3 to 4 inches apart on an ungreased large cookie sheet. Flatten each log to 1-inch thick. Make a 1/2-inch-deep, 1-inch-wide indentation down the center of each log, using fingers or the back of a spoon.

Bake in preheated oven about 30 minutes or until edges are firm and lightly brown. Cool on cookie sheet on a wire rack for 5 minutes. If necessary, reform indentations by pressing with a spoon. Transfer cookies to wire racks and cool completely.

Spoon some of the preserves evenly down center of each log. Drizzle each log with glaze. Let stand until set. Cut each log diagonally into 1-inch-wide slices. Makes about 36 bars.

Note: To toast nuts, spread them in a single layer in a shallow baking pan. Bake in a preheated 350F oven for 5 to 10 minutes or until nuts are slightly golden brown, stirring once or twice. Cool completely. Finely chop nuts and set aside.

To store: Bake cookie logs as directed; cool completely. Do not fill indentations with jam; do not drizzle with glaze. Place cookie logs in a single layer in an airtight container; cover. Or place logs in resealable freezer bags; seal to close. Freeze for up to 3 months. Thaw cookie logs about 15 minutes. Fill logs with preserves, drizzle with glaze, and cut into slices as directed.

Almond Glaze: Stir together 1/2 cup powdered sugar, 1 teaspoon milk, and 1/4 teaspoon almond extract in a small bowl. Stir in enough additional milk, 1/2 teaspoon at a time, to make glaze of drizzling consistency. Makes 1/4 cup.