Prep your lemon: Zest the lemon first, then juice it. Measure 2 tablespoons juice and 1–2 teaspoons zest.
Add to blender: Combine cottage cheese, lemon juice, zest, sweetener, vanilla, and salt in a high-speed blender or food processor.
Add Greek yogurt or mascarpone if using.
Blend until silky: Process on high for 45–60 seconds, scraping down the sides as needed, until completely smooth and fluffy. Taste and adjust sweetener or lemon.
Chill for best texture: Spoon into serving dishes and refrigerate for 20–30 minutes. This helps it set and taste extra creamy.
Garnish and serve: Top with a few berries, a sprinkle of zest, or nuts for crunch.
Serve cold.