Bring a large pot of water to a boil and salt generously. Add the pasta and cook according to directions, when there are 2-3 minutes of time left, add the snap peas for a quick blanch. Drain.
Add the drained pasta and peas to a large bowl.
Add the juice and zest of the lemon to a small bowl and whisk in the olive oil and sour cream.
Notes
This recipe is very forgiving. You can use more or less snap peas or smoked trout depending on the package size you can find. Obviously more is better!