Cut panettone into 1-inch/2.5cm thick slices. Trim off the edges if desired.
Give each panettone slice a quick dive into the warm almond syrup. Arrange them onto 2 baking trays.
Pipe out almond cream or spread it out with an offset spatula. Save leftover almond cream for later use (it can be kept frozen for awhile).
Top toasts with the nuts mixture. At this juncture, the panettone toasts can be stored in the refrigerator for a couple of days or kept frozen for up to 3 months.
Baking
Preheat fan oven to 340ºF/170ºC. Bake panettone French toast for 22 minutes. Dust with powdered sugar if desired. Enjoy!