In a blender or food processor, blend the cottage cheese until completely smooth. (Yes, it looks weird at first. Keep going.)
Add the cream cheese, Greek yogurt, lemon juice, olive oil, Dijon mustard, and horseradish. Blend again until creamy and well combined.
Transfer the dip to a bowl. Add fresh herbs, more black pepper, and red pepper flakes (if using). Stir gently to combine.
Add the chopped smoked salmon and fold it in with a spatula or spoon. If you want bits and pieces, leave it like this. If you prefer a smoother texture, blend it a few times to incorporate the salmon into the dip.
Give it a taste! Add more lemon juice, yogurt, or herbs to balance the flavors to your liking.
Spoon into a serving bowl or plate Swirl the top with a spoon, drizzle with olive oil, and finish with extra herbs, lemon zest, or thinly sliced red onion.
Notes
Blend that cottage cheese like you mean it - until it’s ultra-smooth and creamy. Use high-quality smoked salmon - best one is home-smoked!Chill the dip - for at least 30 minutes before serving. Taste before you salt - smoked salmon, cottage cheese, and Dijon already bring a salty punch. Always taste before adding more salt.