Preheat oven to 325°F (165°C).
Mix almond flour, eggs, and melted butter into a cohesive dough. Roll between parchment sheets into a large rectangle.
Combine ground poppy seeds, cream, sweetener, butter, vanilla, almond extract, and salt in a saucepan. Cook over medium-low heat 8–10 minutes, stirring often, until thickened into a paste. Cool slightly.
Spread the poppy seed filling evenly over the dough, leaving a small border.
Using the parchment to help, roll the dough tightly into a log, starting from one long edge.
Transfer to a lined baking sheet, seam-side down.
Bake 30–35 minutes until golden.
Cool completely before slicing.