Clean the mushrooms, remove the stems, place the mushroom heads in the olive oil.
Finely chop the stems and toast them in a pan (without fat). Mix the Gouda, the chopped stems and herbs well, fill the mushrooms to the brim. Cut the pepper (remove the seeds) and chop finely. Then sprinkle on the mushrooms, put the rest of the cheese mixture on top so that cheese can run onto the mushroom edges later. Bake the mushrooms on the grill until the cheese has melted.
Annotation:
Depending on how much cheese mass fits into the mushroom heads, a little more or less Gouda may be required!