Lemon Icebox Pie Squares

Makes: 8 - 10 servings

Preheat oven to 350°. Pulse graham cracker sheets in a food processor 3 to 4 times or until crackers resemble coarse sand. Add butter and sugar. Pulse until crumbs are moist.
Line an 11- x 7-inch baking dish with aluminum foil, allowing 2 to 3 inches to extend over sides. Lightly grease foil. Press cracker crumb mixture firmly on bottom of dish.
Whisk egg yolks until blended. Whisk in sweetened condensed milk and next 3 ingredients. Pour over crust.
Bake at 350° for 15 minutes or until slightly set. Cool completely on a wire rack (about 1 hour).
Cover with plastic wrap; freeze 8 to 24 hours. Lift pie from dish, using foil sides as handles. Remove foil; place pie on a cutting board. Let stand at room temperature 15 minutes; cut into squares. Serve with whipped cream, if desired. Garnish, if desired.