Swedish Apple Tart

My mom made this popular Swedish country-style apple tart often enough when I was a kid that I should have remembered it (unfortunately, my excuse is that it has been quite a while since then), but I had forgotten this recipe until a few years back, when I was served a variation of it at Operakällaren, an old and well-known restaurant in Stockholm. Prepared lingonberries are a staple found in every Swedish pantry. You can substitute cranberry jam, if you wish, but if you use purchase