Here are the Raspberry Linzer Tortes (Linzertortes) that I made for my family recently. The recipe for my diabetic-friendly Orange Marmalade Linzer Torte is on Page 119 of my cookbook.
The beauty of this is you can choose ANY low-sugar jam, preserves or marmalade you prefer when baking this; doesn’t have to be raspberry or orange.
Lots of low-sugar (and no-sugar) jam/preserves/marmalade varieties are available nowadays!