PREHEAT air fryer to 400° F. Pat Catfish dry with paper towel. Season with salt and pepper, and then coat in fish fry breading. Lightly spray breaded Catfish strips with cooking spray.
PLACE Catfish in a single layer in basket of air fryer. Cook for 10 minutes. Remove the basket, flip Catfish and cook for an additional 10 minutes.
SET aside 1⁄2 cup chopped mango for garnish.
COMBINE mangos, lemon juice, mustard, vinegar and honey in a food processor, and blend until smooth. Drizzle in salad oil while blending until smooth.
PLACE spinach in bowls, top with Catfish, mangos and thinly sliced red onion. Drizzle with mango vinaigrette.