First, pre-heat the oven to 200°C with heat on the top and no fan on the bottom.
In the meantime, crush the garlic with a pinch of salt. Then, add the olive oil, the finely cut parsley and the pepper.
Mix everything well so all the ingredients integrate well.
On the other hand, wash the mushrooms as we previously explained, first inside a container with water and later under the faucet rubbing them with a fine brush.
Drain them well, drying the excess of water using cooking paper and place them on a tray.
Pour the seasoning over all the mushrooms so that they are well covered so the flavor is even.
Take them to the pre-heated oven and lower the temperature to 180°C and bake for 15 minutes, until, when pricking them with a fork, you feel that they are tender and they have brown edges.