Preheat oven to 400°F.
Place the cauliflower, olives, garlic, rosemary, chili, lemon zest, oil and vinegar on a baking tray and toss to coat. Roast for 15–20 minutes or until the cauliflower is golden and crisp.
While the cauliflower is roasting, cook the pasta in a large pot of boiling salted water for 8–10 minutes or until al dente. Drain the pasta and return to the pot.
Add the roasted cauliflower mixture and lemon juice and toss to combine. Sprinkle with the Pecorino Romano to serve. Serve with Salmon.