Peel and finely chop the onion. Heat the fat in a pan. Sauté onion in it, add minced meat and sauté. Drain beans and corn and add. Deglaze with tomato puree and let it boil down a bit.
Season to taste with salt, pepper, cayenne, chilli and paprika. Clean and wash spring onions and cut them into pieces of about 12 cm. Briefly sauté in a little boiling salted water and drain. Bake the tacos briefly in a hot oven.
First fill with 1 spring onion and then with chilli con carne and serve immediately.