Peel and chop the onion. Heat the oil. Fry the minced onion in it until crumbly. Add onion and fry. Season with salt, pepper, chilli and paprika
Rinse kidney beans and drain well. Add baked beans with sauce and kidney beans to the mince and heat. Add tomatoes, bring to the boil briefly and season to taste. Grate cheese
Pour the tortilla chips into a large ovenproof pan or mould and spread the bean mince mixture on top. Add the sour cream and cheese. Bake in a preheated oven (electric range: 225 °C / fan-assisted oven: 200 °C / gas: level 4) for 10-12 minutes