Marinate the Shrimp: In a bowl, combine the shrimp with 1 tablespoon of olive oil, lime juice, fajita seasoning, salt, and pepper. Toss to coat the shrimp evenly, then let it marinate for at least 15 minutes (up to 30 minutes if you have the time).
Prepare the Vegetables: While the shrimp marinates, slice the bell pepper and onion into thin strips. Toss the vegetables with 1 tablespoon of olive oil, 1 teaspoon of fajita seasoning, and salt and pepper. Set aside.
Preheat the Air Fryer: Preheat your air fryer to 400°F (200°C) for a few minutes.
Air Fry the Shrimp and Vegetables:
Place the marinated shrimp and vegetables in the air fryer basket in a single layer (you may need to cook in batches if your air fryer is small).
Cook the shrimp for 6-8 minutes, shaking the basket halfway through. The shrimp should turn pink and opaque when done.
Cook the vegetables for 8-10 minutes, shaking halfway through until they are tender and lightly charred.
Assemble the Fajitas: Warm the tortillas in the microwave or on a skillet. Spoon the cooked shrimp and vegetables into each tortilla and add your desired toppings such as sour cream, guacamole, salsa, and cilantro.
Serve: Enjoy your shrimp fajitas immediately, garnished with lime wedges and extra toppings.