Good on Qadgop for discovering hjortronsylt. I have another couple of suggestions for him and other happy Dopers in possession:
Waffles with cloudberry jam and whipped cream.
Breaded and fried Camembert with cloudberry jam (or deep-fried, for that extra-cholesterol-full-fat bonanza)
Crème brulée surprise. Simple as pie, just put in a spoonful of jam in the moulds, add custard, bake and serve as usual.