Cook the pasta following pack instructions. Meanwhile, heat the oil in a large saucepan and cook the garlic for 1-2 mins until softened. Add the spinach and continue to cook until just wilted. Stir through the cream cheese, lemon zest juice and, and some black pepper.
Drain the pasta but reserve a few spoonfuls of the cooking water. Add the salmon, basil and pasta to the sauce, along with the cooking water to loosen it a little. Toss together and season with more pepper, to taste, before serving.