1Wash the potatoes and prick them with a fork. Place them in the air fryer basket and cook at 180°C (350°F) for 20 minutes, shaking the basket halfway through.
2While the potatoes cook, trim the woody ends of the asparagus and cut into 5 cm (2 inch) pieces. Slice the red onion into thin rings, mince the garlic, and dice the bell peppers. Halve the mushrooms and drain the artichoke hearts.
3In a large bowl, combine the asparagus, onion, garlic, peppers, mushrooms, artichoke hearts, and olives. Add 2 tablespoons of melted butter and toss well.
4Once the potatoes are done, remove them from the air fryer and let cool slightly. Increase the air fryer temperature to 200°C (400°F).
5Season the salmon fillets with salt and pepper. Place each on a piece of aluminum foil, top with remaining butter and thyme sprigs, then seal into a tight packet.
6Place the vegetable mixture directly on the air fryer rack or in the basket. Cook at 200°C (400°F) for 10 minutes, shaking once.
7After 10 minutes, push the vegetables to one side and add the foil-wrapped salmon packets to the air fryer. Cook for another 8–10 minutes, until the salmon is cooked through and flakes easily.
8While everything cooks, chop the parsley. In a small bowl, mix the crème fraîche with half the parsley and a pinch of salt.
9To serve, split the fluffy potatoes and fluff the insides with a fork. Divide the roasted vegetables among plates, top with a salmon fillet, and drizzle with the cream sauce. Garnish with remaining parsley.