Heat the oven to 200C/180C fan/gas 6. Combine the turkey, fajita seasoning and lime juice, if using, then set aside. Arrange half the tortilla chips over a large baking tray in a single, even layer.

Spoon over half the turkey mixture, half the salsa, half the cheese and half the spring onions. Top with the remaining tortilla chips, then repeat with the rest of the turkey mixture, salsa, cheese and spring onions. Bake for 15-20 mins until the cheese has melted and everything is warmed through. Spoon over the soured cream and jalapeños before serving.