In a small saucepan, combine the cranberries (or haskap berries), sugar, and water. Bring to a gentle simmer over medium heat, stirring occasionally, until the berries burst and soften, about 10 minutes.
Remove from heat and let the mixture cool slightly, then blend until smooth. Strain through a fine mesh sieve to remove seeds and skins, pressing with a spoon to extract as much puree as possible. Let cool completely.
In a mixing bowl, whip the heavy cream with the vanilla extract, honey, and a pinch of salt until soft peaks form.
Gently fold the cooled cranberry puree into the whipped cream, creating a marbled effect or fully incorporating, depending on preference.
Spoon into serving glasses or bowls and refrigerate for at least 30 minutes to set.
Garnish with toasted almond slivers before serving. Enjoy chilled.