Bring a large saucepan of salted water to the boil for the pasta. Pick some of the parsley leaves, then finely chop the remaining leaves, discarding the stems. Separate the smoked salmon slices, then coarsely tear into pieces.
Step 2 — Pan-fry capers
Heat a drizzle of olive oil in a small frypan over high heat. Cook the capers for 2-3 mins until they pop open. Remove from the pan and drain on paper towel.
Step 3 — Cook pasta and peas
Add the pasta to the pan of boiling water and cook, stirring to separate the strands, for 1 min. Add the peas and cook, stirring occasionally, for a further 2-3 mins until the pasta is al dente and the peas are tender. Drain, then rinse under cold water to cool.
Step 4 — Make salad
Put the pasta and peas, smoked salmon, chopped parsley and horseradish dressing in a bowl and toss to combine. Taste, then season with salt and pepper.
Step 5 — Serve up
Divide the pasta salad among bowls. Scatter over the capers and parsley leaves and enjoy!
Step 6 — Make it yours
If you have a lemon on hand, add a squeeze of lemon juice to the dish just before serving.