Heat the oil in a frying pan and cook the onions gently until begining to colour. Stir in the garlic and chilli.
Add the chicken and cook for 2-3 minutes.
Add the cumin, paprika and oregano and mix well then stir in the chopped tomatoes.
Reduce the heat and simmer for 10 minutes until the chicken is cooked through and the sauce has thickened.Season to taste. Meanwhile preheat the oven to 200℃ (180℃ fan)/400°F/gas mark 6.
Spread the tortilla chips out in a layer on a baking tray or shallow ovenproof dish. Spoon the chicken on top and cover with cheese. Add a few slices of picked jalapeño if desired.
Bake for 8-10 minutes until the cheese has melted. Sprinkle with coriander if using and serve immediately with your favourite accompaniments.
Notes
Nutrition information is approximate and is meant as a guideline only. (It does not include seasoning with salt and pepper or serving accompaniments.)