Place the bell peppers in the cooking basket and drizzle with 1 tablespoon of canola oil.
Cook for 5 minutes.
Reduce the temperature to 350°F (175°C), add the tomatoes and spring onions to the basket, and cook for an additional 10 minutes.
Reserve the vegetables.
Add the beef sausages to the Air Fryer basket, drizzle with the remaining 1 tablespoon of canola oil, and cook at 380°F (193°C) for 15 minutes, flipping halfway through.
Assemble the sandwiches by placing a sausage in each hot dog bun, topping with air-fried vegetables, and drizzling with mustard.
Serve warm.
Notes / Tips / Wine Advice:
Wine AdvicePair with a crisp beer or a light rosé wine to complement the savory flavors.