Preheat your 5- or 6-quart air fryer to 350˚F for 3 minutes.
Boil, steam, or microwave the potatoes until they are tender, then drain.
Mash the potatoes with olive oil until they are smooth.
Meanwhile, carefully pull out the air-fryer pan and basket.
Spray the basket with oil, then place the salmon in the basket.
Slide the pan and basket back into the appliance.
Keep the temperature set at 350˚F and set the timer for 6 minutes.
Cook until the salmon is cooked through.
Pull out the pan and basket, and allow the salmon to cool in the basket.
Flake the salmon into the mashed potatoes and mash until the salmon breaks into smaller pieces.
Add the green onions, lemon zest, dill (or parsley), egg, and half of the breadcrumbs.
Season and stir to combine.
With damp hands, shape the mixture into eight patties.
Place them on a tray and freeze for 10 minutes to firm up.
Coat the patties in the remaining breadcrumbs and spray them generously with cooking spray.
Place the crumbed patties in the basket.
Keep the temperature set at 350˚F and set the timer for 8 minutes.
Cook, turning the patties halfway through the cooking time, or until they are golden and heated through.
Serve the fish cakes with lemon wedges.
Notes / Tips / Wine Advice:
For red curry fish cakes, use the equivalent weight of sweet potatoes instead of russet potatoes and stir 2 tablespoons of Thai red curry paste into the mash; use cilantro instead of dill.
Short on time? Use a 15-ounce tub of mashed potatoes or sweet potatoes.