Peel and finely chop the onion. Heat oil in a pan. Fry the mixed mince in it until crumbly. Steam onion briefly. Drain the corn grains. Add with peeled cherry tomatoes and juice. Simmer for 5-8 minutes.
Season to taste with salt, pepper and chilli powder. Distribute with tacochips in the pans. Place the sliced raclette cheese on top. Bake in the raclette machine for about 3 minutes.