Chop the fresh cilantro up very finely and add it to a small mixing bowl together with the very smooth butter and the lime zest. Add a pinch of salt to it as well.

Then stir the butter and cilantro until well mixed. Place the butter back in the fridge for a couple of minutes until it is easier to shape it.

You can roll it into a sausage shape in some cling film or make quenelles or spread it in any mould you want.

Then place the butter back in the fridge to chill and set. In the meantime transfer the beef mince to a large mixing bowl and add the chili powder, ground coriander and garlic powder. Season with a pinch of salt.

Stir or knead the mince well. Then divide it into 2 even portions and shape it into hamburger patties.

Bake the hamburgers in a bit of olive oil.

Slice the cilantro butter or divide it into 2 pieces.

Once the hamburgers are golden brown on both sides and cooked on the inside place the cilantro butter on top of each steak. Turn the heat off and let the butter melt a little. Then transfer the hamburgers onto plates. Serve hot.