Beat the egg whites with a pinch of salt until foamy.
Gradually add the sugar, continuing to beat until you get a firm meringue.
Meanwhile, whip the cream until stiff peaks form.
Blend half of the cherry compote with an immersion blender.
Gently fold this blended compote into the meringue using a spatula until evenly combined.
Fold in the whipped cream until fully incorporated.
Prepare a rectangular mold greased and lined with cling film.
Pour about 1/3 of the mixture into the mold. Spread some of the chunky cherry jam on top.
Add another 1/3 of the mixture, followed by more jam.
Finish with the remaining mixture and cover with cling film.
Freeze for at least 8 hours or overnight.
Unmold the semifreddo onto a serving plate.
Decorate the top with the remaining cherry jam and cherries.