Seasoning Mineral B Pan
Per the  manual  for your MINERAL B pan, you should season it as follows:

Seasoning: preparing your frying pan
Pour about one millimeter of oil -just to cover the bottom of the pan- and heat it until smoke appears. Next, thrown away the oil in a pan and wipe your pan with paper towels . The more the pan is used, the better the performance. The darker it becomes the better it is for natural nonstick properties.

The manual continues on with use and care instructions.