Add the Greek yogurt, Biscoff spread, blended cottage cheese, maple syrup, vanilla, and lemon juice. Beat until fully combined, smooth, and thick. With the mixer running on low, slowly drizzle in the cooled (but still liquid) bloomed gelatin. Increase to medium and beat for another 30 seconds until fully incorporated. Taste the filling and adjust sweetness if needed.
1 cup plain full fat Greek yogurt, 1 cup Biscoff spread, 3 tbsp maple syrup, 1 tsp vanilla extract, Juice of half a lemon