Trim the edges of the frangipane and cut crosswise into 3 equal pieces. Spread a thin layer of jam on one strip and top with a second strip. Spread with jam and top with the final strip of frangipane. Cut the layered cake into 1-in/3-cm strips and cut each strip into slices ¼ in/0.6 cm thick.
Line a domed mold (3 lb/1.36 kg) with plastic wrap, making sure some