Peel and finely chop the onion. Heat the oil in a pan and fry the minced meat thoroughly while turning. Add onion and fry. Season with salt, pepper, paprika and chilli powder.
Put the kidney beans on a sieve, rinse cold and drain. Add baked beans with the juice and kidney beans to the mince and heat. Add the tomatoes and bring to the boil briefly. Season again.
Finely grate the cheese. Put corn chips in a pan and spread the bean mince mixture on top. Add crème fraîche and cheese and bake in a preheated oven (electric: 200 °C/ gas: level 3) for 10-15 minutes.