Preheat the oven at 200 degrees Celsius.
Peel and cut the onion in small pieces.
Heat up a frying pan add the butter, fry the mince beef and onion.
Add the taco spices and 100 ml water. Continue cooking until the water is gone.
Add a baking paper on a baking sheet.
Place the first layer of the bread, add half of the mince beef evenly on the bread.
Place the second layer of the bread and place evenly the other half of the mince beef.
Add the last layer of the bread and sprinkle the cheese evenly on top.
Place in the middle of the oven for 10 minutes.
Take out the cake and decorate it with the salami, olives, mozzarella and the tomatoes.
Sprinkle some garlic sauce over it all, and it's ready to serve.