We like to serve this with grilled peppers and toasted baguette. Edited to add: if you're using store bought wasabi paste, be aware that it is MUCH weaker, and if you want it to have a kick, you'll need to add quite a bit more.
- Stir lemon juice and wasabi paste into the sour cream.
- Add crushed garlic and horseradish.
- Season with salt and pepper to taste.