Heat the oven to 180°C. Spread the pine nuts on a tray and toast for 5–8 minutes until golden. Set aside for later.
Chop the courgette, red onion, peppers, and tomatoes into bite‑sized pieces. Toss with a little oil, salt, and pepper. Spread the veg on a baking tray and roast for 25–30 minutes, until softened and lightly caramelised.
While the veg roasts, put a large pan of salted water on the hob and bring it to the boil.
Chop the chicken breasts into bite‑sized pieces and cook in a pan with a little oil until golden and cooked through.
Whilst the chicken and veg is cooking add the pasta to the boiling water and cook according to the packet instructions.
When the pasta is cooked, drain it but reserve a cup of pasta water. Return the pasta to the pan.
Stir in the pesto and crème fraîche, loosening with a splash of pasta water until creamy and well coated.
Spoon the creamy pesto pasta into bowls. Top with the cooked chicken, roasted vegetables, and toasted pine nuts — or mix everything together in the pan for a big, hearty toss‑through.