Whisk eggs, almond flour, cream cheese, and salt together until smooth to make the crepe batter.
Melt a small amount of butter in a nonstick skillet over medium heat. Pour in a thin layer of batter, swirling to coat the pan, and cook 1–2 minutes per side until just set. Repeat to make 8 crepes.
Mix farmer cheese, egg yolk, sugar substitute, and vanilla together for the filling.
Spoon filling onto each crepe, fold in the sides, and roll into a log.
Melt remaining butter in the skillet and pan-fry the blintzes seam-side down first, 2–3 minutes per side, until golden.