Heat oven to 350. Coat a 13x9 inch pan with cooking spray. Set aside.
For the apricot filling, grate the zest of one medium to large size orange. In a medium saucepan combine the orange juice from the zested orange, the orange zest, apricots, sugar, and 2/3 cups water to boiling over medium heat, stirring occasionally. Reduce the heat to medium-low, simmer 15 minutes, stirring occasionally. Remove from heat.
For the cookie base, in a large bowl combine the cookie mix and the nutmeg. With a pastry blender or fork, cut in the 1/2 cup of cold butter until mixture is crumbly. Add the vanilla and egg, toss with a fork to combine. Set aside 3/4 cup of the crumb mixture. Press the remaining into the bottom of the 13x9 inch pan. Bake at 350 for 15 minutes.
Spoon apricot mixture evenly over cookie base. Crumble remaining cookie mixture evenly over top of apricots mixture. Sprinkle with almonds. Bake for 350 for 25 to 30 minutes or until top is light golden brown. Cool 10 minutes.
Sprinkle top with 1/2 cup powdered sugar. Let cool and cut into bars.