I made an amazing dessert yesterday: Goumi Cream Roll Cake
Saturday my son and I picked the ripe berries from the yard, maybe a bit more than a liter worth. About half Goumi, the rest mostly strawberries with a few alpine strawberries and a smattering of red currants.
I squeezed a half a lemon in and put in about 1/3 cup sugar, then we cooked it down until it was as thick as we wanted it to be. We put it through the food mill to separate stems, seeds, etc. BTW - the BEST food mill is the Squeezo with aftermarket stainless screens. We were left with about 1.5 cups of excellent jam.
Next day I made a sponge cake for rolling according to this recipe.
Except scaled up to 7 eggs to fit my bigger pan.
Once the cake was cooled I spread on the jam from the day before.
Then I put on the cream filling: a bit less than 2c cream, 2tbs sugar, 2tsp vanilla whipped most of the way, then added about 1c leftover cream pie filling which wouldn’t fit in last week’s amazing strawberry cream pie, then whipped some more. The cream pie filling served to stiffen up and stabilize the whipped cream and give it a more substantial feel. But if I didn’t have it I would have just used plain whipped cream. I’ve made versions of this cake plenty of times with straight cream and it is ok especially if you are eating it same day.
I went outside and picked a few more strawberries to form the core of the roll.
Then I rolled it up, wrapped it in double foil (helps keep the shape) and put it in the fridge for a few hours. Took it out, trimmed the ends, piped a little leftover cream on top and garnished with a few of the berries that went into it.
My wife was very skeptical since she hates Goumis. The other day I broached the idea of planting another one and it did not go over well! But when you cook it down into jam with a bunch of sugar, then dilute it with a bunch of cake and cream filling… well then even a Goumi hater will probably like it 
It really was very tasty.
I was annoyed at those creases in the outside; those got formed when it was wrapped in the fridge. Probably the cake shrunk some and the covering crinkled. Not too many complaints about the crinkles from the customers though.