Preheat the air fryer to 200C (see cooking tip). Quarter the unpeeled potatoes. Generously spray the potato on all sides with olive oil and put in the air-fryer basket. Air-fry the potato, shaking the basket halfway, for 15-20 mins until golden and cooked through. Remove from the air fryer and cover to keep warm.
Step 2 — Air-fry fish
Put the crumbed fish in the air-fryer basket and air-fry at 200C, turning halfway, for 10-12 mins until golden and cooked through. Remove from the air fryer and scatter both sides with a large pinch of mint and garlic seasoning.
Step 3 — Cook peas
Meanwhile, bring a small saucepan of water to the boil. Add the peas, return to the boil and cook for 1 min. Drain, then rinse under cold water to cool.
Step 4 — Toss salad
Combine the peas, salad leaves and 2 tsp olive oil in a bowl and season with salt and pepper.
Step 5 — Reheat chips
Return the chips to the air fryer and reheat for 2 mins or until warmed through. Scatter over the remaining mint and garlic seasoning and season with pepper.
Step 6 — Make dill ranch and serve
While the chips are reheating, reserve a few small sprigs, then finely chop the dill, including the stems. Combine the chopped dill and ranch dressing in a bowl and season with salt and pepper. Divide the crumbed fish, chips and pea salad among plates. Scatter with the reserved dill sprigs and serve with the dill ranch dressing.